I got the following MediaWiki Internal error when I tried to “move” the article Mr._Horn’s_Strathspey to Mr._Horn’s_Strathspey_(1).
Now, the moved article [ Mr._Horn’s_Strathspey_(1) ] is accessible while the original one [ Mr._Horn’s_Strathspey ] returns this exception ( caught inside another exception handler)
Too much for my technical skills.
I did some research in Google to find an answer but, assuming that I have found some solution (something related to $wgMultiContentRevisionSchemaMigrationStage and SCHEMA_COMPAT_WRITE_BOTH), I confess that I did not understand how to apply it.
Any help is greatly appreciated.