This field name already exists. Choose another name

[Oleksandr_Babiy]

I have created a field called CPC.
In the course of work, I removed it from the list.
When I try to create a field with the same name, I get
This field name already exists. Choose another name
How to correct this error and re-create fields with names that were previously created and deleted?
Reconnecting to the base was done...

[Shubhankar]

Also try refreshing the data source or browser  as well.