Adding Adjacency bonus to improvement from terrain

[Nymus]

So I'm trying to add adjacency bonus to an improvement(monastery) from terrain (mountain) but for some reason it's not working. here is the code I'm using

INSERT INTO Improvement_Adjacencies (ImprovementType, YieldChangeId) VALUES ('IMPROVEMENT_MONASTERY','Monastery_Mountain_Adjacency1');

INSERT INTO Adjacency_YieldChanges (ID, Description,YieldType,YieldChange,TilesRequired,AdjacentTerrain) VALUES ('Monastery_Mountain_Adjacency1','Placeholder','YIELD_FOOD','3','1','TERRAIN_GRASS_MOUNTAIN');

Can anyone tell me what I'm doing wrong or does Terrain adjacency for improvement just doesn't work?