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 ('b6ed2b00d9cd22144cf2d9f8e27143c1', -1, 1422303971, 1422303971, '365955e7', 16, 0, 0)

Line : 187
File : sessions.php