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 ('4fd7be94e719703df2ea35f0b3ac80e4', -1, 1518982901, 1518982901, '321322ff', -1, 0, 0)

Line : 187
File : sessions.php