How to remove Look up value from item

[TomasG]

Hi, 

can anybody helps me. I have flow to update item. Item has several lookup fields. Sometimes lookup fields has value. And I need to remove this value using flow (Sharepoint update action). I used null value to set up lookup field, but it doesnt work. 

Any ideas? Thanks.  

[GeorgiosG · Accepted solution]

Hi @TomasG 

the value -1 should do the job.

Enter a custom value and type in -1.

[TomasG]

Yes, it works. Thanks!