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 ('d3ce3a07c75e0ab8011c8f1b669421d2', -1, 1513627688, 1513627688, '36a0f579', -4, 0, 0)

Line : 172
File : sessions.php