Fail to save record of a File type Module

HI.

I made a module file type with module builder.

I created and deleted some records without problem, but latelly when i create a new record the screens stay blank.

I check the log file and shows me the message:


Wed Aug 16 23:28:16 2017 [3184][1][ERROR] upload_file could not copy [ upload://736ab890-ca04-d171-8128-59935026c193 ] to [ upload://bc92fd4e-b7fc-beb4-90ce-59951b93e3ca ]
Wed Aug 16 23:28:17 2017 [3184][1][FATAL] Error inserting into table: your_module: Query Failed: INSERT INTO your_module (id,date_entered,date_modified,modified_user_id,created_by,deleted,filename, .... )
VALUES ('bc92fd4e-b7fc-beb4-90ce-59951b93e3ca','2017-08-17 04:28:16','2017-08-17 04:28:16','1','1',0,'','2017-08-16', .....): MySQL error 1062: Duplicate entry 'bc92fd4e-b7fc-beb4-90ce-59951b93e3ca' for key 'PRIMARY'
Wed Aug 16 23:28:17 2017 [3184][1][FATAL] Exception in Controller ....

So, it seems to be a problem with some duplicated records but i though SuiteCRM assigns by itself, so, what can i do to this?

Thanks.