CiviCRM locking may not account for multiple CiviCRM sites per server
GET_LOCK()uses server-wide lock names.
- CiviCRM's lock name generation does not seem to include the current CiviCRM site / DB name / identifier
- Therefore, multiple CiviCRM sites on the same DB server may compete for the same lock names.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information