A query's data space sources read one data space, in one execution context (PLAN §11.25): the first fixes them, and each other one is invalid, with a message naming both. The cube's model fixes the version.
A query's data space sources read one data space, in one execution context (PLAN §11.25): the first fixes them, and each other one is invalid, with a message naming both. The cube's model fixes the version.