# Which Problems Are Solved
There are some problems related to the use of CockroachDB with the new
notification handling (#8931).
See #9002 for details.
# How the Problems Are Solved
- Brought back the previous notification handler as legacy mode.
- Added a configuration to choose between legacy mode and new parallel
workers.
- Enabled legacy mode by default to prevent issues.
# Additional Changes
None
# Additional Context
- closes https://github.com/zitadel/zitadel/issues/9002
- relates to #8931
