We don't know how this error occurs. It is not specific to WorklogPRO and can happen to any add-on as discussed here. Solving this error requires you to run DDL statements in your database. What you need to do is:
- Remove WorklogPRO add-on
- Stopped Jira
- Export data from all tables with AO_7B9828 prefix
- Drop all of the tables with AO_7B9828 prefix
- Started JIRA
- Install WorklogPRO add-on
- Re-import the data exported in step 3