Duplicate entry '548'......

Hi there,

After installing node gallery except for the site admin, the rest of users get the following error when publishing a gallery:

Duplicate entry '548' for key 'PRIMARY' query: INSERT INTO node_gallery_images (nid, gid, weight) VALUES (548, 545, 0) en /home/xxxxxxx/public_html/includes/common.inc en la línea 3538.

Also, I tried to use node Gallery as a post for organic groups but I also get the ssame error, even for the site admin.

I'm using plupload also.

Any help please...

Thank you