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 ('4ec56b170f07e775e6f6cbd2b375718f', -1, 1519538141, 1519538141, '365cc552', 30, 0, 0)

Line : 187
File : sessions.php