Make database client try to use most recent connection instead of generating new one

src/primaite/simulator/system/applications/database_client.py

@@ -193,6 +193,9 @@ class DatabaseClient(Application):
             return False
 
         if connection_id is None:
+            if self.connections:
+                connection_id = list(self.connections.keys())[-1]
+            else:
                 connection_id = str(uuid4())
 
         if not self.connections.get(connection_id):