Manually added debug watchers can not be removed

If manual add debug variable(s) during debug session then no way except close QtCreator and clean with hands file %APPDATA%/QtProject/qtcreator/$PROJECT$.qws
from theese variables:
<variable>value-Watchers</variable>
<valuelist type="QVariantList">
<value ...>
...
<value ...>
</valuelist>
to form:
<variable>value-Watchers</variable>
<valuelist type="QVariantList"/>