Diagnosis
The previous run of the current metachain is not yet complete. This canlead to communication errors with the subchains.

System Response
The current run of the subchain is cancelled.

Procedure
End the current run of the metachain, or wait until the run has ended.
It does not matter whether the run was successfully completed or not.
Restart the subnode.
We recommend scheduling a longer time period between the subchain runsin order to avoid this situation.