What are some of the approaches used to fix uom conversion issues in onhand inventory?

We have some inventory that went into Oracle Process MFG Inventory (12.1) at the wrong conversions. Need to get some insight on approaches used to correct those issues.

Specifically (Examples):

1) We have inventory of Item A (Primary 1 Units/ Secondary 11 Units / Conversion 1= 10) . If we issue out the 1 primary unit, after the transaction is complete, there will be a balance of 0 in primary units and 1 in secondary unit.

How can we then remove the 1 secondary unit that is stuck in inventory with 0 primary to adjust?

2) When we do an issue transaction, can we override the conversion factor and specify the primary and secondary quantities being issued on one transaction (so in the above example, we would issue 1 Primary and 11 Secondary Units so that it is zeroed out ).