diff --git a/metricflow/dag/id_generation.py b/metricflow/dag/id_generation.py
index e08fca06de..1fd5e03581 100644
--- a/metricflow/dag/id_generation.py
+++ b/metricflow/dag/id_generation.py
@@ -35,6 +35,7 @@
 SQL_EXPR_IS_NULL_PREFIX = "isn"
 SQL_EXPR_CAST_TO_TIMESTAMP_PREFIX = "ctt"
 SQL_EXPR_DATE_TRUNC = "dt"
+SQL_EXPR_SUBTRACT_TIME_INTERVAL_PREFIX = "sti"
 SQL_EXPR_EXTRACT = "ex"
 SQL_EXPR_RATIO_COMPUTATION = "rc"
 SQL_EXPR_BETWEEN_PREFIX = "betw"
diff --git a/metricflow/sql/sql_exprs.py b/metricflow/sql/sql_exprs.py
index bb6c13b851..2206691e7c 100644
--- a/metricflow/sql/sql_exprs.py
+++ b/metricflow/sql/sql_exprs.py
@@ -16,6 +16,7 @@
 
 from metricflow.dag.id_generation import (
     SQL_EXPR_BETWEEN_PREFIX,
+    SQL_EXPR_CAST_TO_TIMESTAMP_PREFIX,
     SQL_EXPR_COLUMN_REFERENCE_ID_PREFIX,
     SQL_EXPR_COMPARISON_ID_PREFIX,
     SQL_EXPR_DATE_TRUNC,
@@ -29,6 +30,7 @@
     SQL_EXPR_RATIO_COMPUTATION,
     SQL_EXPR_STRING_ID_PREFIX,
     SQL_EXPR_STRING_LITERAL_PREFIX,
+    SQL_EXPR_SUBTRACT_TIME_INTERVAL_PREFIX,
     SQL_EXPR_WINDOW_FUNCTION_ID_PREFIX,
 )
 from metricflow.dag.mf_dag import DagNode, DisplayedProperty, NodeId
@@ -1265,7 +1267,7 @@ def __init__(  # noqa: D
 
     @classmethod
     def id_prefix(cls) -> str:  # noqa: D
-        return SQL_EXPR_IS_NULL_PREFIX
+        return SQL_EXPR_SUBTRACT_TIME_INTERVAL_PREFIX
 
     @property
     def requires_parenthesis(self) -> bool:  # noqa: D
@@ -1321,7 +1323,7 @@ def __init__(self, arg: SqlExpressionNode) -> None:  # noqa: D
 
     @classmethod
     def id_prefix(cls) -> str:  # noqa: D
-        return SQL_EXPR_IS_NULL_PREFIX
+        return SQL_EXPR_CAST_TO_TIMESTAMP_PREFIX
 
     @property
     def requires_parenthesis(self) -> bool:  # noqa: D