COBDB0108 host-var is non-unique and should be qualified.

The host variable host-var is not unique and requires that you qualify it.

Resolution:

Fully qualify a host variable in an SQL query. For example if the ORD-NO host variable exists in both the ORDERS and ITEMS copybooks, and you want the host variable from the ORDERS copybook to be used in the query, specify:
:ORDERS.ORD-NO