I've updated this module to the latest 7.x-2.x version on my site running PostgreSQL.
When I run update.php, I get this error:
The following updates returned messages
ultimate_cron module
Update #7203
Failed: PDOException: SQLSTATE[42601]: Syntax error: 7 ERROR: syntax error at or near "Array" LINE 1: ..."peacock_ultimate_cron_lock_idx_name_key" UNIQUE (Array,curr... ^: ALTER TABLE {ultimate_cron_lock} ADD CONSTRAINT "peacock_ultimate_cron_lock_idx_name_key" UNIQUE (Array,current); Array ( ) in db_add_unique_key() (line 2918 of /var/www/html/includes/database/database.inc).
Closed: outdated
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I'm closing this since Drupal 7 is now unsupported and there will be no more development on the Drupal 7 branch of Ultimate Cron either.
Thank you for taking the time and effort in reporting this issue, even though it never got resolved.