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 ('7807a81e40f5b37c1b35aa0d755f76ba', -1, 1526969919, 1526969919, '369edbf8', 4, 0, 0)

Line : 187
File : sessions.php