Fix KeyError when deleting a field with unqiue=True #233

	name: ci
	on:
	push:
	branches-ignore:
	- main
	pull_request:
	branches-ignore:
	- main
	jobs:
	ci:
	runs-on: ubuntu-latest
	services:
	postgres:
	image: postgres:latest
	ports:
	- 5432:5432
	env:
	POSTGRES_PASSWORD: 123456
	POSTGRES_USER: postgres
	options: --health-cmd=pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
	steps:
	- name: Start MySQL
	run: sudo systemctl start mysql.service
	- uses: actions/cache@v4
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('**/poetry.lock') }}
	restore-keys: \|
	${{ runner.os }}-pip-
	- uses: actions/checkout@v4
	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install and configure Poetry
	run: \|
	pip install -U pip poetry
	poetry config virtualenvs.create false
	- name: CI
	env:
	MYSQL_PASS: root
	MYSQL_HOST: 127.0.0.1
	MYSQL_PORT: 3306
	POSTGRES_PASS: 123456
	POSTGRES_HOST: 127.0.0.1
	POSTGRES_PORT: 5432
	run: make ci

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