diff --git a/.github/changelog-processor.py b/.github/changelog-processor.py
index 29e86bd3ea..43ad132fed 100755
--- a/.github/changelog-processor.py
+++ b/.github/changelog-processor.py
@@ -45,6 +45,8 @@
     lines = changelog.readlines()
 
     if args.validate_changelog:
+        versions = set()
+            
         for line in lines:
             if line.startswith("##"):
                 if line.startswith("###"):
@@ -57,6 +59,13 @@
                     print("Only Major.Minor.Patch are supported as versioning")
                     print(line)
                     sys.exit(-1)
+                else:
+                    version = line.strip().removeprefix("## [").split("]")[0]
+                    if version in versions:
+                        print("Found version '" + version + "' more than once")
+                        sys.exit(-1)
+                    else:
+                        versions.add(version)
             elif line.startswith("#"):
                 if line.strip() != "# Changelog":
                     print("Line starting with `#` is only allowed for `# Changelog`")
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c9470ebd3..f083d6a5bb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - RFC-5: Add request revenue info ([runtimes#381](https://github.com/polkadot-fellows/runtimes/pull/381), [SDK v1.14 #3940](https://github.com/paritytech/polkadot-sdk/pull/3940)).
 - Core-Fellowship: new `promote_fast` call ([runtimes#381](https://github.com/polkadot-fellows/runtimes/pull/381), [SDK v1.14 #4877](https://github.com/paritytech/polkadot-sdk/pull/4877)).
 - Pallet ranked collective: max member count per rank ([runtimes#381](https://github.com/polkadot-fellows/runtimes/pull/381), [SDK v1.14 #4807](https://github.com/paritytech/polkadot-sdk/pull/4807)).
-
 - All runtimes: XcmPaymentApi and DryRunApi ([polkadot-fellows/runtimes#380](https://github.com/polkadot-fellows/runtimes/pull/380))
 
 #### From [#322](https://github.com/polkadot-fellows/runtimes/pull/322):