Update failed: opigno_scorm_update_8003

Hello I have such error: Module Update ID Type Description opigno_scorm 8003 hook_update_n Update required activities field. Set default value to NULL. Do you wish to run the specified pending updates? (yes/no) [yes]: > y > [notice] Update started: opigno_scorm_update_8003 > [error] SQLSTATE[HY000]: General error: 1709 Index column size too large. The maximum column size is 767 bytes.: ALTER TABLE {opigno_scorm_user_answer_results} CHANGE interaction_id interaction_id VARCHAR(255) DEFAULT NULL; Array > ( > ) > > [error] Update failed: opigno_scorm_update_8003 [error] Update aborted by: opigno_scorm_update_8003 [error] Finished performing updates. Can you please help? Thank you!