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 ('f1226935bc9307e8fe85c7c189a7a18d', -1, 1462395940, 1462395940, '365718fb', -1, 0, 0)

Line : 187
File : sessions.php