Version in base suite: 6.1.123+1
Version in overlay suite: 6.1.124+1

Base version: linux-signed-arm64_6.1.124+1
Target version: linux-signed-arm64_6.1.128+1
Base files: linux-signed-arm64_6.1.124+1.dsc
Target files: linux-signed-arm64_6.1.128+1.dsc

-E: version-substvar-for-external-package linux-headers-arm64 -> linux-headers-6.1.0-30-arm64
-E: version-substvar-for-external-package linux-headers-cloud-arm64 -> linux-headers-6.1.0-30-cloud-arm64
-E: version-substvar-for-external-package linux-headers-rt-arm64 -> linux-headers-6.1.0-30-rt-arm64
-W: odd-historical-debian-changelog-version 6.1.123-1 (for native)
+E: version-substvar-for-external-package linux-headers-arm64 -> linux-headers-6.1.0-31-arm64
+E: version-substvar-for-external-package linux-headers-cloud-arm64 -> linux-headers-6.1.0-31-cloud-arm64
+E: version-substvar-for-external-package linux-headers-rt-arm64 -> linux-headers-6.1.0-31-rt-arm64
+W: odd-historical-debian-changelog-version 6.1.124-1 (for native)