@NotNull -> @nullable

Author: Ghost-chu

src/main/java/org/maxgamer/quickshop/api/database/DatabaseHelper.java

@@ -154,7 +154,7 @@ public interface DatabaseHelper {
      */
     void updateShop(@NotNull String owner, @NotNull ItemStack item, int unlimited, int shopType,
                     double price, int x, int y, int z, @NotNull String world, @NotNull String extra,
-                    @NotNull String currency, boolean disableDisplay, @Nullable String taxAccount);
+                    @Nullable String currency, boolean disableDisplay, @Nullable String taxAccount);
 
     /**
      * Insert a history record into logs table