If the Id file is corrupt then the only solution is to replace the id file with a working copy. There is no "id- fixup" or any other cure for a defective id.
In an environment, where all possibilities that IBM delivers are in use, getting a new id file is as easy as deleting the old one and restarting the client.
This function is called "Id Vault".
Without a vault, someone at the helpdesk has to either - recover the ide using the id recovery (if in use, it is the function that was used before id vault) - get the id file from a backup - recreate the id file (loosing all encrypted data that has been encrypted with the broken id)
So: there is nothing for you to do, as all of these steps need a domino- administrator.
As written earlier: the only chance is to rename the id... If ID Vault is in place, it will be automatically recreated