diff --git a/e2e_test/source_inline/kafka/avro/name_strategy.slt b/e2e_test/source_inline/kafka/avro/name_strategy.slt
index e48be738886f..212c79e6f31a 100644
--- a/e2e_test/source_inline/kafka/avro/name_strategy.slt
+++ b/e2e_test/source_inline/kafka/avro/name_strategy.slt
@@ -84,17 +84,6 @@ python3 scripts/source/schema_registry_producer.py  "${RISEDEV_KAFKA_BOOTSTRAP_S
 
 
 
-statement error SCHEMA_REGISTRY_NAME_STRATEGY_TOPIC_RECORD_NAME_STRATEGY expect non-empty field key\.message
-create table t_topic_record () with (
-    connector = 'kafka',
-    topic = 'upsert_avro_json-topic-record',
-    properties.bootstrap.server = '${RISEDEV_KAFKA_BOOTSTRAP_SERVERS}'
-) format upsert encode avro (
-    schema.registry = '${RISEDEV_SCHEMA_REGISTRY_URL}',
-    schema.registry.name.strategy = 'topic_record_name_strategy',
-    message = 'CPLM.OBJ_ATTRIBUTE_VALUE'
-);
-
 statement ok
 create table t_topic_record (primary key(rw_key))
 INCLUDE KEY AS rw_key
@@ -105,8 +94,7 @@ with (
 ) format upsert encode avro (
     schema.registry = '${RISEDEV_SCHEMA_REGISTRY_URL}',
     schema.registry.name.strategy = 'topic_record_name_strategy',
-    message = 'CPLM.OBJ_ATTRIBUTE_VALUE',
-    key.message = 'string'
+    message = 'CPLM.OBJ_ATTRIBUTE_VALUE'
 );
 
 
diff --git a/src/connector/src/parser/avro/parser.rs b/src/connector/src/parser/avro/parser.rs
index 68ac7d446846..dde74a999ac9 100644
--- a/src/connector/src/parser/avro/parser.rs
+++ b/src/connector/src/parser/avro/parser.rs
@@ -29,7 +29,7 @@ use crate::error::ConnectorResult;
 use crate::parser::unified::AccessImpl;
 use crate::parser::util::bytes_from_url;
 use crate::parser::{
-    AccessBuilder, AvroProperties, EncodingProperties, EncodingType, MapHandling, SchemaLocation,
+    AccessBuilder, AvroProperties, EncodingProperties, MapHandling, SchemaLocation,
 };
 use crate::schema::schema_registry::{
     extract_schema_id, get_subject_by_strategy, handle_sr_list, Client,
@@ -55,18 +55,14 @@ impl AccessBuilder for AvroAccessBuilder {
 }
 
 impl AvroAccessBuilder {
-    pub fn new(config: AvroParserConfig, encoding_type: EncodingType) -> ConnectorResult<Self> {
+    pub fn new(config: AvroParserConfig) -> ConnectorResult<Self> {
         let AvroParserConfig {
             schema,
-            key_schema,
             writer_schema_cache,
             ..
         } = config;
         Ok(Self {
-            schema: match encoding_type {
-                EncodingType::Key => key_schema.context("Avro with empty key schema")?,
-                EncodingType::Value => schema,
-            },
+            schema,
             writer_schema_cache,
             value: None,
         })
@@ -148,7 +144,6 @@ impl AvroAccessBuilder {
 #[derive(Debug, Clone)]
 pub struct AvroParserConfig {
     schema: Arc<ResolvedAvroSchema>,
-    key_schema: Option<Arc<ResolvedAvroSchema>>,
     /// Writer schema is the schema used to write the data. When parsing Avro data, the exactly same schema
     /// must be used to decode the message, and then convert it with the reader schema.
     writer_schema_cache: WriterSchemaCache,
@@ -167,7 +162,6 @@ impl AvroParserConfig {
     pub async fn new(encoding_properties: EncodingProperties) -> ConnectorResult<Self> {
         let AvroProperties {
             schema_location,
-            enable_upsert,
             record_name,
             key_record_name,
             map_handling,
@@ -183,38 +177,21 @@ impl AvroParserConfig {
                 let client = Client::new(url, &client_config)?;
                 let resolver = ConfluentSchemaCache::new(client);
 
-                let subject_key = if enable_upsert {
-                    Some(get_subject_by_strategy(
-                        &name_strategy,
-                        topic.as_str(),
-                        key_record_name.as_deref(),
-                        true,
-                    )?)
-                } else {
-                    if let Some(name) = &key_record_name {
-                        bail!("unused FORMAT ENCODE option: key.message='{name}'");
-                    }
-                    None
-                };
+                if let Some(name) = &key_record_name {
+                    bail!("unused FORMAT ENCODE option: key.message='{name}'");
+                }
                 let subject_value = get_subject_by_strategy(
                     &name_strategy,
                     topic.as_str(),
                     record_name.as_deref(),
                     false,
                 )?;
-                tracing::debug!("infer key subject {subject_key:?}, value subject {subject_value}");
+                tracing::debug!("value subject {subject_value}");
 
                 Ok(Self {
                     schema: Arc::new(ResolvedAvroSchema::create(
                         resolver.get_by_subject(&subject_value).await?,
                     )?),
-                    key_schema: if let Some(subject_key) = subject_key {
-                        Some(Arc::new(ResolvedAvroSchema::create(
-                            resolver.get_by_subject(&subject_key).await?,
-                        )?))
-                    } else {
-                        None
-                    },
                     writer_schema_cache: WriterSchemaCache::Confluent(Arc::new(resolver)),
                     map_handling,
                 })
@@ -224,16 +201,12 @@ impl AvroParserConfig {
                 aws_auth_props,
             } => {
                 let url = handle_sr_list(schema_location.as_str())?;
-                if enable_upsert {
-                    bail!("avro upsert without schema registry is not supported");
-                }
                 let url = url.first().unwrap();
                 let schema_content = bytes_from_url(url, aws_auth_props.as_ref()).await?;
                 let schema = Schema::parse_reader(&mut schema_content.as_slice())
                     .context("failed to parse avro schema")?;
                 Ok(Self {
                     schema: Arc::new(ResolvedAvroSchema::create(Arc::new(schema))?),
-                    key_schema: None,
                     writer_schema_cache: WriterSchemaCache::File,
                     map_handling,
                 })
@@ -248,7 +221,6 @@ impl AvroParserConfig {
                 let schema = resolver.get_by_name(&schema_arn).await?;
                 Ok(Self {
                     schema: Arc::new(ResolvedAvroSchema::create(schema)?),
-                    key_schema: None,
                     writer_schema_cache: WriterSchemaCache::Glue(Arc::new(resolver)),
                     map_handling,
                 })
diff --git a/src/connector/src/parser/debezium/debezium_parser.rs b/src/connector/src/parser/debezium/debezium_parser.rs
index bc43e556cb4f..398659392077 100644
--- a/src/connector/src/parser/debezium/debezium_parser.rs
+++ b/src/connector/src/parser/debezium/debezium_parser.rs
@@ -75,9 +75,6 @@ async fn build_accessor_builder(
                     .unwrap_or(TimestamptzHandling::GuessNumberUnit),
             )?,
         )),
-        EncodingProperties::Protobuf(_) => {
-            Ok(AccessBuilderImpl::new_default(config, encoding_type).await?)
-        }
         _ => bail!("unsupported encoding for Debezium"),
     }
 }
diff --git a/src/connector/src/parser/maxwell/maxwell_parser.rs b/src/connector/src/parser/maxwell/maxwell_parser.rs
index 8ba95ad21213..1f13c8a8bc30 100644
--- a/src/connector/src/parser/maxwell/maxwell_parser.rs
+++ b/src/connector/src/parser/maxwell/maxwell_parser.rs
@@ -19,7 +19,7 @@ use crate::only_parse_payload;
 use crate::parser::unified::maxwell::MaxwellChangeEvent;
 use crate::parser::unified::util::apply_row_operation_on_stream_chunk_writer;
 use crate::parser::{
-    AccessBuilderImpl, ByteStreamSourceParser, EncodingProperties, EncodingType, ParserFormat,
+    AccessBuilderImpl, ByteStreamSourceParser, EncodingProperties, ParserFormat,
     SourceStreamChunkRowWriter, SpecificParserConfig,
 };
 use crate::source::{SourceColumnDesc, SourceContext, SourceContextRef};
@@ -39,9 +39,7 @@ impl MaxwellParser {
     ) -> ConnectorResult<Self> {
         match props.encoding_config {
             EncodingProperties::Json(_) => {
-                let payload_builder =
-                    AccessBuilderImpl::new_default(props.encoding_config, EncodingType::Value)
-                        .await?;
+                let payload_builder = AccessBuilderImpl::new_default(props.encoding_config).await?;
                 Ok(Self {
                     payload_builder,
                     rw_columns,
diff --git a/src/connector/src/parser/mod.rs b/src/connector/src/parser/mod.rs
index fcf945184458..5029986fee30 100644
--- a/src/connector/src/parser/mod.rs
+++ b/src/connector/src/parser/mod.rs
@@ -869,14 +869,11 @@ pub enum AccessBuilderImpl {
 }
 
 impl AccessBuilderImpl {
-    pub async fn new_default(
-        config: EncodingProperties,
-        kv: EncodingType,
-    ) -> ConnectorResult<Self> {
+    pub async fn new_default(config: EncodingProperties) -> ConnectorResult<Self> {
         let accessor = match config {
             EncodingProperties::Avro(_) => {
                 let config = AvroParserConfig::new(config).await?;
-                AccessBuilderImpl::Avro(AvroAccessBuilder::new(config, kv)?)
+                AccessBuilderImpl::Avro(AvroAccessBuilder::new(config)?)
             }
             EncodingProperties::Protobuf(_) => {
                 let config = ProtobufParserConfig::new(config).await?;
@@ -1072,7 +1069,6 @@ impl SpecificParserConfig {
 #[derive(Debug, Default, Clone)]
 pub struct AvroProperties {
     pub schema_location: SchemaLocation,
-    pub enable_upsert: bool,
     pub record_name: Option<String>,
     pub key_record_name: Option<String>,
     pub map_handling: Option<MapHandling>,
@@ -1224,9 +1220,6 @@ impl SpecificParserConfig {
                     map_handling: MapHandling::from_options(&format_encode_options_with_secret)?,
                     ..Default::default()
                 };
-                if format == SourceFormat::Upsert {
-                    config.enable_upsert = true;
-                }
                 config.schema_location = if let Some(schema_arn) =
                     format_encode_options_with_secret.get(AWS_GLUE_SCHEMA_ARN_KEY)
                 {
diff --git a/src/connector/src/parser/plain_parser.rs b/src/connector/src/parser/plain_parser.rs
index f34fd2983717..1454ca8ade1f 100644
--- a/src/connector/src/parser/plain_parser.rs
+++ b/src/connector/src/parser/plain_parser.rs
@@ -17,8 +17,8 @@ use risingwave_common::bail;
 use super::unified::json::TimestamptzHandling;
 use super::unified::kv_event::KvEvent;
 use super::{
-    AccessBuilderImpl, ByteStreamSourceParser, EncodingProperties, EncodingType,
-    SourceStreamChunkRowWriter, SpecificParserConfig,
+    AccessBuilderImpl, ByteStreamSourceParser, EncodingProperties, SourceStreamChunkRowWriter,
+    SpecificParserConfig,
 };
 use crate::error::ConnectorResult;
 use crate::parser::bytes_parser::BytesAccessBuilder;
@@ -61,7 +61,7 @@ impl PlainParser {
             | EncodingProperties::Protobuf(_)
             | EncodingProperties::Avro(_)
             | EncodingProperties::Bytes(_) => {
-                AccessBuilderImpl::new_default(props.encoding_config, EncodingType::Value).await?
+                AccessBuilderImpl::new_default(props.encoding_config).await?
             }
             _ => bail!("Unsupported encoding for Plain"),
         };
diff --git a/src/connector/src/parser/upsert_parser.rs b/src/connector/src/parser/upsert_parser.rs
index df5e3b66e313..c7bcce9f86a8 100644
--- a/src/connector/src/parser/upsert_parser.rs
+++ b/src/connector/src/parser/upsert_parser.rs
@@ -18,7 +18,7 @@ use risingwave_pb::plan_common::additional_column::ColumnType as AdditionalColum
 use super::bytes_parser::BytesAccessBuilder;
 use super::unified::{AccessImpl, ChangeEventOperation};
 use super::{
-    AccessBuilderImpl, ByteStreamSourceParser, BytesProperties, EncodingProperties, EncodingType,
+    AccessBuilderImpl, ByteStreamSourceParser, BytesProperties, EncodingProperties,
     SourceStreamChunkRowWriter, SpecificParserConfig,
 };
 use crate::error::ConnectorResult;
@@ -34,16 +34,11 @@ pub struct UpsertParser {
     source_ctx: SourceContextRef,
 }
 
-async fn build_accessor_builder(
-    config: EncodingProperties,
-    encoding_type: EncodingType,
-) -> ConnectorResult<AccessBuilderImpl> {
+async fn build_accessor_builder(config: EncodingProperties) -> ConnectorResult<AccessBuilderImpl> {
     match config {
         EncodingProperties::Json(_)
         | EncodingProperties::Protobuf(_)
-        | EncodingProperties::Avro(_) => {
-            Ok(AccessBuilderImpl::new_default(config, encoding_type).await?)
-        }
+        | EncodingProperties::Avro(_) => Ok(AccessBuilderImpl::new_default(config).await?),
         _ => bail!("unsupported encoding for Upsert"),
     }
 }
@@ -80,8 +75,7 @@ impl UpsertParser {
         } else {
             unreachable!("format upsert must have key column")
         };
-        let payload_builder =
-            build_accessor_builder(props.encoding_config, EncodingType::Value).await?;
+        let payload_builder = build_accessor_builder(props.encoding_config).await?;
         Ok(Self {
             key_builder,
             payload_builder,