phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c6b79f6f81fbf80e51866558d221e55f', -1, 1500943309, 1500943309, '36a21ba2', 9, 0, 0)

Line : 187
File : sessions.php