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 ('d5617076b2dc90a2bc0e41ef09bc9d98', -1, 1508831601, 1508831601, '36e12f5e', -4, 0, 0)

Line : 187
File : sessions.php