Problem
This error populates when an user tries to transfer an asset from one site to another which are sister sites in the hierarchy and this error persists even after deleting and creating new transfers too;
Solution
In order to mitigate this error, we need to check if one or more standard tasks, for the asset(s) being transferred, appear to have a requirement with an invalid warehouse. Removing the warehouse reference, or deleting the requirement completes the transfer.
See Also : SR : 7001174347