Version in base suite: 6.12.73+1
Version in overlay suite: 6.12.74+2

Base version: linux-signed-arm64_6.12.74+2
Target version: linux-signed-arm64_6.12.85+1
Base files: linux-signed-arm64_6.12.74+2.dsc
Target files: linux-signed-arm64_6.12.85+1.dsc

-E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-arm64 -> linux-headers-6.12.74+deb13+1-arm64 [debian/control:18]
-E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-arm64-16k -> linux-headers-6.12.74+deb13+1-arm64-16k [debian/control:26]
-E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-cloud-arm64 -> linux-headers-6.12.74+deb13+1-cloud-arm64 [debian/control:34]
-E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-rt-arm64 -> linux-headers-6.12.74+deb13+1-rt-arm64 [debian/control:42]
-W: odd-historical-debian-changelog-version 6.12.74-1 (for native) [debian/changelog:9]
+E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-arm64 -> linux-headers-6.12.85+deb13-arm64 [debian/control:18]
+E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-arm64-16k -> linux-headers-6.12.85+deb13-arm64-16k [debian/control:26]
+E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-cloud-arm64 -> linux-headers-6.12.85+deb13-cloud-arm64 [debian/control:34]
+E: version-substvar-for-external-package Depends ${binary:Version} linux-headers-rt-arm64 -> linux-headers-6.12.85+deb13-rt-arm64 [debian/control:42]
+W: odd-historical-debian-changelog-version 6.12.74-2 (for native) [debian/changelog:2541]