While updating to neos 4.0 I am running into this error message:
An exception occurred while executing ‘ALTER TABLE
flow_doctrine_migrationstatus CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci’:
Specified key was too long; max key length is 767 bytes
[ERROR] The transaction was rolled back.
Database charset/collation was converted.
Any idea how to fix that?