To do this, it is necessary to adjust the Zalando sales price of the variant. You can make a small price change: for example, change the price by +0.01 EUR and then back again (-0.01 EUR). The price will then be transmitted to Zalando within 15 minutes. The transmission can be tracked at any time in the log. 

Which price is reported as the regular price to Zalando was defined by you at the beginning in the Zalando setup assistant.