System message:
```
mac OS Monterey
version: 12.2.1
```
Sourcetree application info:
```
version: 4.1.6(242)
embedded git 2.31.0
embedded git-lfs 2.13.2
embedded git-flow
embedded mercurial 4.6.1
```
Git config:
```
http.sslverify=false
filter.lfs.clean=git-lfs clean -- %f
filter.lfs.smudge=git-lfs smudge -- %f
filter.lfs.process=git-lfs filter-process
filter.lfs.required=true
core.excludesfile=/Users/keroming/.gitignore_global
difftool.sourcetree.cmd=/usr/local/bin/bcomp "$LOCAL" "$REMOTE"
difftool.sourcetree.path=-ro
mergetool.sourcetree.cmd=/usr/local/bin/bcomp "$LOCAL" "$REMOTE" "$BASE" "$MERGED"
mergetool.sourcetree.trustexitcode=true
commit.template=/Users/keroming/.stCommitMsg
mergetool.keepbackup=false
```
Problem:
When I merged other branches, I tried to use external merge tool to resolve conflicts, but I found that the external merge tool could not be launched, try to switch various external tools, can't start
So I run the following command under the project.
```
git mergetool -y --tool=sourcetree -- src/business/api/bot.ts
```
This command output:
```
Merging:
src/business/api/bot.ts
Deleted merge conflict for 'src/business/api/bot.ts':
{local}: deleted
{remote}: modified file
Use (m)odified or (d)eleted file, or (a)bort?
```
I have seen someone in a long time, I have fed back such a problem, and no one explains what the specific reason is how to solve this problem.
I am now the latest version, I can't make a version upgrade.
So this problem is repeated and can't be cured?
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