phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './private_phpb1/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a23cbd19dddc5451c7fecc292b703898', -1, 1425049972, 1425049972, '36a7b3d2', 3, 0, 0)

Line : 187
File : sessions.php