Error "illegal_argument_exception" illegal b value: 1.2 BM25

Hello everyone

I tried hyper parameter tuning BM25 and unfortunately i tried putting b=1.2 in the settings which was wrong wince it always gets a value between zero and one.

Now i try to fix the value of b but i get the following error:

curl -XPUT "http://localhost:9200/my_index/_settings" -d '
"similarity": {
"my_similarity": {
"type": "BM25",
"b" : 0.1,
"k1" : 0.9

{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"illegal b value: 1.2, must be between 0 and 1"}],"type":"illegal_argument_exception","reason":"illegal b value: 1.2, must be between 0 and 1"},"status":400}

It seems like it sticks to the former wrong value of "1.2" and does not understand that the new value o want to set is 0.1

Could you help me?
Thank you in advance

Could you please look at your log file and grab the entire exception stack trace?