Graylog don't write into elasticsearch anymore

hi

in Graylog UI/index set and via curl elasticseach is “green”

1 node
1 data nodes
16 active primary shards
16 active shards
the others value are 0
active shards percent as number 100.00

in graylog

evrything is green with this message :
4 indices with a total of {number going up every second} messages Under management

I Wonder if I is note better to erase all data …