CANNOT_RENAME_ACROSS_SCHEMA message error

[Iam]

Hello...

We enabled Unity Catalog and we are migrating schemas. When I ran the command

sync schema catalog01.schema01 FROM hive_metastore.schema01 dry run

 I got the error CANNOT_RENAME_ACROSS_CATALOG, reviewing your documentation it only said 

CANNOT_RENAME_ACROSS_CATALOG
SQLSTATE: 0AKD0 
Renaming a <type> across catalogs is not allowed.

Could be more precise about which data type are you referring or how can I fix this issue?

[Iam]

Based on your answer I was able to identify the reason.

This schema was already synced to another catalog.

Thank you