grou[ invite also gets random local id

model/profile.go

@@ -277,6 +277,7 @@ func (p *Profile) GetGroupByGroupID(groupID string) (g *Group) {
 func (p *Profile) ProcessInvite(gci *protocol.GroupChatInvite, peerHostname string) {
 	group := new(Group)
 	group.GroupID = gci.GetGroupName()
+	group.LocalID = generateRandomID()
 	group.SignedGroupID = gci.GetSignedGroupId()
 	copy(group.GroupKey[:], gci.GetGroupSharedKey()[:])
 	group.GroupServer = gci.GetServerHost()