Upgrade lock to unique in subgraph if any graph storage needs to be reloaded.
Upgrade lock to unique in subgraph if any graph storage needs to be reloaded.

thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS,thomaskrause/graphANNIS