If you have not yet upgraded to 5.0, we recommend you skip 5.0.0 and upgrade directly to 5.0.3 or newer. This release does not automatically update your database collation from utf8_unicode_ci to utf8mb4_unicode_ci like 5.0.0 would do. To update your collation, visit Tools > Utilities post upgrade or installation and click the button to update your collation. Please note that it can take several minutes or more to complete.