Rogue indexfile blocking deployment

After making some changes in the model I am stuck trying to redeploy ot my acceptance cloud. When I "synchronize database structure". I get hit with an error message Failed to execute ddl commands. Error: com.mendix.m2ee.api.AdminException: Executing DDL commands failed. at com.mendix.core.MxRuntime.d(SourceFile:495) Caused by: d: Error (SQL State: 42704, Error Code: 0) on executing: DROP INDEX "idxbasistabelleninterrai$capiacapauterus" All changes are rolled back. at bg.a(SourceFile:85) Caused by: org.postgresql.util.PSQLException: ERROR: index "idxbasistabelleninterrai$capiacapauterus" does not exist AFAICT that table was actually dropped in the pre-previous version of the package, but for some reason this one is hanging around and causing trouble. Q&D suggestions to get rid of this much appreciated !
1 answers

What if you cleared the acceptance environment first? Then deploy and restore a backup database.