6027-929 [W] Attention: In RULE 'ruleName' (ruleNumber), both pools 'poolName' and 'poolName' are EXTERNAL. This is not a supported migration.
Explanation
The command does not support migration between two EXTERNAL pools.
User response
Correct the rule and reissue the command.
Note: This
is not an unrecoverable error. The command will continue to run.