IC: Add scenario support.

src/Model/InitialConditions/InitialConditionsDict.py

@@ -64,7 +64,8 @@ class InitialConditionsDict(PamhyrModelDict):
 
             execute(
                 "DELETE FROM initial_conditions " +
-                f"WHERE reach = '{reach.id}'"
+                f"WHERE reach = '{reach.id}' " +
+                f"AND scenario = {self._status.scenario_id}"
             )
 
             ok &= self._dict[reach]._db_save(execute, data)