error.txt

Cannot assign undefined to newState.byUserId[userId] because inexact undefined [1] is incompatible with exact
StoredReviewsData [2].

     src/amo/reducers/reviews.js
 [2]  64│   [userId: number]: StoredReviewsData,
        :
     473│
     474│         delete newState.byId[reviewId];
     475│         newState.byAddon[addonSlug] = undefined;
     476│         newState.byUserId[userId] = undefined;
     477│         newState.groupedRatings[addonId] = undefined;
     478│       }
     479│       return newState;

     /private/tmp/flow/flowlib_2a6f2aed/core.js
 [1]  13│ declare var undefined: void;