#28351: "Conflicting migrations detected" CommandError due to replacement
Migration
being removed
-----------------------------------------+------------------------
Reporter: Daniel Hahler | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.11
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
-----------------------------------------+------------------------
I am getting the following error:
{{{
CommandError: Conflicting migrations detected; multiple leaf nodes in the
migration graph: (0002_initial_models, 0XXX_merge_20170628_1435 in myapp).
To fix them run 'python manage.py makemigrations --merge'
}}}
Running the command results in `No conflicts detected to merge.` however.
`0002_initial_models` is not actually a leaf node, but `0003_initial_data`
depends on it.
`0003_initial_data` however is removed, since it replaces
`0XXX_merge_20170628_1435`, which is not applied yet and therefore also
does not show up in `showmigrations`?!
(it gets removed in
https://github.com/django/django/blob/a6756195c1a11eee10c16c96fe95d52e22e1d9ba/django/db/migrations/graph.py#L252)
I think `0003_initial_data` should still show up in `showmigrations`, but
with some indication that it replaces other migrations.
That would happen in case it wasn't removed as a leaf node in
https://github.com/django/django/blob/a6756195c1a11eee10c16c96fe95d52e22e1d9ba/django/core/management/commands/showmigrations.py#L82-L83.
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Ticket URL: <https://code.djangoproject.com/ticket/28351>
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