conflict in profile: same package appears twice

[Andy Tai]

atai@localhost /share/software/guix/guix.git$ guix install dconf
The following package will be upgraded:
   dconf (dependencies or package changed)

guix install: error: profile contains conflicting entries for dconf
guix install: error:   first entry: dconf@0.40.0
/gnu/store/fl75cafmzy5zb3gn9f35mgq6gfrjl2wy-dconf-0.40.0
guix install: error:   second entry: dconf@0.40.0
/gnu/store/57rrnqnl8n55wsg7wwz7znpxnyfd4zba-dconf-0.40.0
hint: You cannot have two different versions or variants of `dconf' in
the same profile.

atai@localhost /share/software/guix/guix.git$ guix upgrade dconf
The following package will be upgraded:
   dconf (dependencies or package changed)

guix upgrade: error: profile contains conflicting entries for dconf
guix upgrade: error:   first entry: dconf@0.40.0
/gnu/store/fl75cafmzy5zb3gn9f35mgq6gfrjl2wy-dconf-0.40.0
guix upgrade: error:   second entry: dconf@0.40.0
/gnu/store/57rrnqnl8n55wsg7wwz7znpxnyfd4zba-dconf-0.40.0
hint: You cannot have two different versions or variants of `dconf' in
the same profile.

Not sure how the same package, the same version, appears twice.  In
any case, any simple way to fix this?