# Requirements
### Minimal versions
- python 3.7
- postgresql 12

# Known issues
- ```
ERROR:  duplicate key value violates unique constraint "pg_type_typname_nsp_index"
DETAIL:  Key (typname, typnamespace)=(headers, 2200) already exists.
```
at the first database init.
https://www.postgresql.org/message-id/28194.1101582367%40sss.pgh.pa.us
Simple restart seems to fix it.
Use of Alembic might help