svn merge with --reintegrate complains about missing ranges but mergeinfo seems correct

I have a project with with the following structure ``` ^/project/trunk ^/project/branches/mybranch ``` where current HEAD is revision 1048. The branch was copied from trunk in r523. trunk has been merged to mybranch with the result being r1048. The mergeinfo on `^/project/branches/mybranch` gives ``` /project/trunk:523-1047 ``` and the mergeinfo of trunk has no record mentioning anything from `^/project/branches/mybranch`. Actually in reality both trunk and branches also hold mergeinfos from branches parallel to `mybranch` but those mergeinfos appear as absolutely identical in both outputs. Now I go into my working copy of trunk and try to issue ``` svn merge --reintegrate ^/project/branches/myproject ``` I get an error message that says: ``` svn: Reintegrate can only be used if revisions 523 through 1048 were previously merged from file:///home/svn/project/trunk to the reintegrate source, but this is not the case: project/branches/mybranch/src Missing ranges: /project/trunk/src:523-1047 ``` That is weird because the mergeinfo on my branch folder tells me that 523-1047 have been correctly merged from trunk to branch. What is the deal with that subfolder? `src` is a directory that obviously exists in both trunk and branch. I think that is where something is fishy. If I look into the mergeinfo of mybranch/src via `svn pg svn:mergeinfo ^/project/branches/mybranch/src@HEAD` I get nothing at all. If I look at the trunk/src however (`svn pg svn:mergeinfo ^/project/trunk/src@HEAD`) I get ``` /project/branches/mybranch/src:784 ``` So it seems as though someone did a cherry-pick from branch to trunk there. However this does not appear in the trunk folder itself. Is that where the trouble lies? And most importantly: how can I cure it??