diff --git a/main.py b/main.py
index a6dd76b..941a49f 100644
--- a/main.py
+++ b/main.py
@@ -319,32 +319,32 @@ async def fastapi_get_reservoir_y(network: str, reservoir: str) -> dict[str, flo
 async def fastapi_set_reservoir_head(network: str, reservoir: str, head: float) -> ChangeSet:
     ps = { 'id' : reservoir, 
            'head' : head }
-    return set_reservoir(network, reservoir, ChangeSet(ps))
+    return set_reservoir(network, ChangeSet(ps))
 
 @app.post("/setreservoirpattern/")
 async def fastapi_set_reservoir_pattern(network: str, reservoir: str, pattern: str) -> ChangeSet:
     ps = { 'id' : reservoir, 
            'pattern' : pattern }
-    return set_reservoir(network, reservoir, ChangeSet(ps))
+    return set_reservoir(network, ChangeSet(ps))
 
 @app.post("/setreservoirx/")
 async def fastapi_set_reservoir_x(network: str, reservoir: str, x: float) -> ChangeSet:
     ps = { 'id' : reservoir, 
            'x' : x }
-    return set_reservoir(network, reservoir, ChangeSet(ps))
+    return set_reservoir(network, ChangeSet(ps))
 
 @app.post("/setreservoirx/")
 async def fastapi_set_reservoir_y(network: str, reservoir: str, y: float) -> ChangeSet:
     ps = { 'id' : reservoir, 
            'y' : y }
-    return set_reservoir(network, reservoir, ChangeSet(ps))
+    return set_reservoir(network, ChangeSet(ps))
 
 @app.post("/setreservoircoord/")
 async def fastapi_set_reservoir_y(network: str, reservoir: str, x: float, y: float) -> ChangeSet:
     ps = { 'id' : reservoir, 
            'x' : x,
            'y' : y }
-    return set_reservoir(network, reservoir, ChangeSet(ps))
+    return set_reservoir(network, ChangeSet(ps))
 
 @app.get("/getreservoirproperties/")
 async def fastapi_get_reservoir_properties(network: str, reservoir: str) -> dict[str, Any]: