With the permission of the trademark owner;

The trademark use right agreement clearly stipulates that after the expiration of the trademark use right license, the inventory goods can continue to be sold;

Reach a new supplementary agreement with the trademark owner on the inventory products.

If there is no such license or agreement, it is suspected of infringing the exclusive right to use a trademark. Trademark owners may be investigated for tort liability.

If the stock is not large, it is best to negotiate.