mcrider/ocs — comment on commit 455d1151172b439081a829ce04de01a72bf5c6b3
File: classes/install/Upgrade.inc.php line 755
By asmecher:

Hmm, this will probably lead us into trouble with IDs, at least with PostgreSQL. When you create a table PostgreSQL creates a corresponding sequence to use for generating IDs. It will start at 1, but we're already pre-filling it with a bunch of content. Chances are that the next notification insert will result in an ID collision. Not sure how MySQL deals with this.