[otrs] Merge tickets that start with same string

I have imported tickets from our previous ticket system into OTRS. Every single reply is its own ticket with one article right now. I need to merge these replies together into the tickets that they are about to complete the migration. Each ticket starts with a ticket number. Looking at the ticket number and merging every ticket that starts with that in the subject would do the trick. Before I start typing this: has anyone made a tool to achieve this before so I don’t have to reinvent the wheel?