Ah duh got it the art xml says
<ImprovementTypeArtDef InternalName="Art_Market">
<ImprovementTypeArtSubPack InternalName="Art_Market_Kingdom">
<SupportedBuildingStyle>KingdomStyle</SupportedBuildingStyle>
<TileDesign>K_Merchant_01</TileDesign>
just changed it to Market_01