I see lines such as these:
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644017772_22516 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644017922_22525 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018042_22532 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018106_24553 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018107_22537 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018137_22539 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018227_22545 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018467_22560 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018527_22563 (no provider)
Jun 30 12:52:33 myserver journal[29321]: Unsupported account type (null) for ID account_1644018557_22565 (no provider)
This is a newly installed Rocky 8 system and it is connected to an IPA server instance running CentOS7.
I haven’t been able to migrate the IPA instance to a later distribution yet, because it has become more difficult to run IPA with separate DHCP and name servers.