Database Query Error:

Table './db_blitzortung/mybo_strikes' is marked as crashed and last (automatic?) repair failed

for query

SELECT s.time time, COUNT(s.id) cnt ,  (s.part>0)  participated
			FROM mybo_strikes s
			
			WHERE s.time BETWEEN '2018-07-17 20:15:00' AND '2018-07-18 20:15:00'
			
			GROUP BY FLOOR(UNIX_TIMESTAMP(s.time) / 60 / 15), participated