Fix ambiguous AssignmentOverride reference
Fix ambiguous AssignmentOverride reference

Change-Id: I9f2994e9f1f142cd163dd4afb1e510bb5bb19f4b
Reviewed-on: https://gerrit.instructure.com/79903
Tested-by: Jenkins
Reviewed-by: Clay Diffrient <9dff2e5c98626d20d2848250c411e8009465bb87@instructure.com>
Product-Review: Christian Prescott <41deed17830828af00eda7388dce7132c49d7816@instructure.com>
QA-Review: Christian Prescott <41deed17830828af00eda7388dce7132c49d7816@instructure.com>

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