diff --git a/Boreal_LBMRDataPrep.R b/Boreal_LBMRDataPrep.R
index 65f1147..5f31ddb 100644
--- a/Boreal_LBMRDataPrep.R
+++ b/Boreal_LBMRDataPrep.R
@@ -578,7 +578,7 @@ Save <- function(sim) {
                                userTags = c(cacheTags, "specieslayers"))
 
     #options(opts)
-    writeRaster(specieslayersList$specieslayers, file.path(outputPath(sim), "speciesLayers.grd"))
+    writeRaster(specieslayersList$specieslayers, file.path(outputPath(sim), "speciesLayers.grd"), overwrite = TRUE)
     sim$specieslayers <- specieslayersList$specieslayers
     sim$speciesList <- specieslayersList$speciesList
   }