For every new branch in Moodle (created when a .0 release happens, part of the process), a couple of new custom fields are created:

• Pull X.Y branch: Name of the branch where the X.Y patch is available.
• Pull X.Y Diff URL: A link showing the patch diff (normally @ GitHub).

Then, also as part of the release process, when some branch falls out from support completely, we proceed to hide those fields couples as far as we won't use them any more (we only show in the Tracker those corresponding to supported branches).

As a result of that, right now we have ~40 hidden fields (from Moodle 1.9 to Moodle 3.8) that are still there and we aren't going to use any more. This implies storage, extra time indexing and a very high number of custom fields (not used at all).

So this issue es about to proceed to:

• Remove all the 1.9 to 3.8 fields.
• Reindex the tracker.

Ciao