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 ('732f2f65f849b64a4d88773b6c52c220', -1, 1511368190, 1511368190, '36c6dd0d', 4, 0, 0)

Line : 187
File : sessions.php