[wp-trac] [WordPress Trac] #27855: Database errors when promoting WP 3.9 to multisite

[WordPress Trac]

#27855: Database errors when promoting WP 3.9 to multisite
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 Reporter:  l3rady             |       Owner:
     Type:  defect (bug)       |      Status:  new
 Priority:  normal             |   Milestone:  Awaiting Review
Component:  Database           |     Version:  3.7
 Severity:  normal             |  Resolution:
 Keywords:  reporter-feedback  |     Focuses:
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Comment (by boonebgorges):

 It's true that BP is using the wp_signups table to store signups on non-MS
 now, but it's not clear to me how that fact alone would result in this
 problem. Maybe there is another plugin that was in use on each of these
 websites that had independently created a table with the name
 `wp_signups`, but created it with a schema that did not match WP core's
 schema exactly. Then, when upgrading (to MS in the one case, and BP 2.0 in
 the other), `dbDelta()` is getting confused when attempting to apply the
 core schema to the existing table. (BP pulls its `signups` schema
 dynamically from `wp_get_db_schema()`, so it's not possible for there to
 be this kind of mismatch in the case of BuddyPress alone.
 https://buddypress.trac.wordpress.org/browser/tags/2.0/bp-core/admin/bp-
 core-schema.php#L351)

 l3rady and leiascofield - What other plugins are you running? In
 particular, what plugins are you using that may modify the way that WP
 registration works?

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Ticket URL: <https://core.trac.wordpress.org/ticket/27855#comment:5>
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