org-set-property
org-set-property is an interactive compiled Lisp function in `org.el
'.
(org-set-property PROPERTY VALUE)
In the current entry, set PROPERTY to VALUE.
When called interactively, this will prompt for a property name, offering
completion on existing and default properties. And then it will prompt
for a value, offering completion either on allowed values (via an inherited
xxx_ALL property) or on existing values in other instances of this property
in the current file.