Denis Ledoux
66409d470e
Reading `state_blanket_order` on multiple records was failing.
e.g.
```python
env['purchase.requisition'].create({})
env['purchase.requisition'].create({})
env['purchase.requisition'].search([]).mapped('state_blanket_order')
```
raised
```python
ValueError: Expected singleton: purchase.requisition(5, 1, 4)
```
closes odoo/odoo#48642
X-original-commit: 031c3f3b0b387cfaf4257cf769c0523097723fc5
Signed-off-by: Denis Ledoux (dle) <dle@odoo.com>