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 ('e96e8c59b8d8891942b01b0c5378ba81', -1, 1511421780, 1511421780, '36a16c9e', 2, 0, 0)

Line : 187
File : sessions.php