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 ('e4066616e8840b2257e7b485a64228db', -1, 1513177129, 1513177129, '36dd883e', 25, 0, 0)

Line : 211
File : sessions.php