data mismatch when trying to run the indexer

i tried to vectorize some file in my blob storage using ai search. i have created a skillset, indexes and indexer as well. while i was running i got a error saying the embedding model return the type of collection(edm.double) but my field is in the type of collection(edm.single). when i tried to change the type of the field to collection(edm.double) it is not a vector field. is it because i use a free tier account or is there any other option.