The current object in the target module cannot be changed.
Explanation
You might not have access rights to create an object at the specified position in the target module, after or below the current object. If you do have access rights, another user might have locked the current object in the target module.
User response
If you do not have access rights to create an object, ask the database administrator for modify access to the target module. Then, try to copy objects to the target module. If you already have access, wait until the other user unlocks the object.