Hi @c4er,
Unfortunately, as the Fix version is a multi-value field in Jira, eazyBI does not support change history for any multi-value fields.
We have had this feature also requested in the eazyBI community previously: Fix Version history. We have it in our backlog, but I can not give any estimates as we are still looking for an appropriate solution.
Lauma / support@eazybi.com