Removing bank statement lines in reconciliation withount deleting bank statement

Hi! We have received duplicate bank statement lines on our bankstatements. This has been going on for a long period of time and we now have partially reconciled bank statements, with statements lines that will not have any transactions to be reconciled with.

Since we have closed periods and have postings that depend on the reconciliation that has already been done, unreconciling the statement lines, deleting the old statements and entering new statements is not an option.

Any suggestions on how we can delete/remove statement lines withount deleting the statement they belong to? Or do any other alternative ways to "reconcile" the statement lines withount creating postings to GL?