diff --git a/.hgtags b/.hgtags
index ba77b0600..9a22da112 100644
--- a/.hgtags
+++ b/.hgtags
@@ -8,3 +8,5 @@ fe535e3e8bc859d4a4e4a186f42670f9e588a5aa release-5-6
 90102c21c4480102634c6a482d0dd55f2d9ca00f release-6-0-pre-3
 ddc0de0e5e7d91b1dcd7c05602c9c2a6adf8d312 release-6-0-pre-1
 0708542a3c391238beadc8e2cf9b25283161848b release-6-0-pre-5
+0000000000000000000000000000000000000000 release-6-0-pre-4
+42d4fcc3a87cb36f6829814cce9b39fcf2f34e00 release-6-0-pre-4