Webservice and category product position

[marloru]

 

Good afternoon,

we have developed an ecommerce using Prestashop 1.6.

We are using Prestashop webservice to synchronize products through a connector with an erp.

We have the following problem:

• the products are correctly synchronized
• We change the category products positions from backoffice
• the products are shown correctly in frontoffice
• Then we synchronize products again and the products positions are lost

 

How could we modiy Prestashop webservice so that it doesn't update the position field in ps_category_product table?

Thank you very much for your help