`neil add` on a dep with `:git/sha` ends up with both `:git/sha` and `:mvn/version`

[teodorlu]

System information

$ bb --version 
babashka v1.12.195
$ neil --version
neil 0.3.68

Problem

neil add on a dep with :git/sha ends up with both :git/sha and :mvn/version. I don't think that makes sense.

Repro

$ cat deps.edn 
{:paths ["src" "notebooks"]
 :deps {io.github.nextjournal/clerk {:git/sha "285c20ee6bff22a14c7ea2be274d9ac0a37b7668"}}
 :aliases
 {:nextjournal/garden {:exec-fn nextjournal.clerk/serve!
                       :exec-args {:index "notebooks/hello.clj"}}}}
$ neil dep add io.github.nextjournal/clerk
$ cat deps.edn 
{:paths ["src" "notebooks"]
 :deps {io.github.nextjournal/clerk {:git/sha "285c20ee6bff22a14c7ea2be274d9ac0a37b7668"
                                     :mvn/version "0.17.1102"}}
 :aliases
 {:nextjournal/garden {:exec-fn nextjournal.clerk/serve!
                       :exec-args {:index "notebooks/hello.clj"}}}}

Expected behavior

:git/sha is deleted, only the version Neil found remains.

$ cat deps.edn 
{:paths ["src" "notebooks"]
 :deps {io.github.nextjournal/clerk {:mvn/version "0.17.1102"}}
 :aliases
 {:nextjournal/garden {:exec-fn nextjournal.clerk/serve!
                       :exec-args {:index "notebooks/hello.clj"}}}}

[borkdude]

Thanks