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 ('5b938138b1a72dc7d33f8b1f5d54d180', -1, 1508594941, 1508594941, '36a269f1', 17, 0, 0)

Line : 187
File : sessions.php