7.6.1 / centos can't run

[jozxing]

{"type":"log","@timestamp":"2021-03-30T08:07:48Z","tags":["error","Sentinl","init"],"pid":75803,"message":"start: Error: init indices: Error: create index: [mapper_parsing_exception] Root mapping definition has unsupported parameters: [sentinl-alarm : {properties={watcher={type=text}, @timestamp={type=date}, attachment={type=binary}, payload={dynamic=true, type=object}, level={type=text}, report={type=boolean}, action={type=text}, error={type=boolean}, message={type=text}}}] :: {"path":"/_template/sentinl_watcher_alarms","query":{},"body":"{\"index_patterns\":\"watcher_alarms*\",\"mappings\":{\"sentinl-alarm\":{\"properties\":{\"payload\":{\"type\":\"object\",\"dynamic\":\"true\"},\"attachment\":{\"type\":\"binary\"},\"error\":{\"type\":\"boolean\"},\"report\":{\"type\":\"boolean\"},\"watcher\":{\"type\":\"text\"},\"action\":{\"type\":\"text\"},\"level\":{\"type\":\"text\"},\"message\":{\"type\":\"text\"},\"@timestamp\":{\"type\":\"date\"}}}},\"settings\":{\"index\":{\"lifecycle\":{\"name\":\"watcher-alarms\",\"rollover_alias\":\"watcher_alarms\"}}}}","statusCode":400,"response":"{\"error\":{\"root_cause\":[{\"type\":\"mapper_parsing_exception\",\"reason\":\"Root mapping definition has unsupported parameters: [sentinl-alarm : {properties={watcher={type=text}, @timestamp={type=date}, attachment={type=binary}, payload={dynamic=true, type=object}, level={type=text}, report={type=boolean}, action={type=text}, error={type=boolean}, message={type=text}}}]\"}],\"type\":\"mapper_parsing_exception\",\"reason\":\"Failed to parse mapping [_doc]: Root mapping definition has unsupported parameters: [sentinl-alarm : {properties={watcher={type=text}, @timestamp={type=date}, attachment={type=binary}, payload={dynamic=true, type=object}, level={type=text}, report={type=boolean}, action={type=text}, error={type=boolean}, message={type=text}}}]\",\"caused_by\":{\"type\":\"mapper_parsing_exception\",\"reason\":\"Root mapping definition has unsupported parameters: [sentinl-alarm : {properties={watcher={type=text}, @timestamp={type=date}, attachment={type=binary}, payload={dynamic=true, type=object}, level={type=text}, report={type=boolean}, action={type=text}, error={type=boolean}, message={type=text}}}]\"}},\"status\":400}"}"}

sentinl to create index is faild，because old 6.x mappings can‘t PUT in ES 7.x

Hope to edit it
Thanks