Undefined column: 7 ERROR: column ... of relation ... does not exist - symfony

Question

A call to the following local endpoint:-
curl -k --location --request POST 'https://localhost:8443/project_exports' \
--header 'Authorization: Bearer eyJ0eXA...YVhA' \
--header 'Content-Type: application/json' \
--data-raw '{
"email": "bob#test.com",
"projectid": 0,
"status": true,
"emailedat": "2022-08-22T09:56:28.487Z",
"generatedat": "2022-08-22T09:56:28.487Z"
}'
returns an error like thus:-
"message": "An exception occurred while executing a query: SQLSTATE[42703]: Undefined column: 7 ERROR: column \"projectid\" of relation \"project_export\" does not exist\nLINE 1: INSERT INTO project_export (id, email, projectid, status, em...\n ^",
"code": 500
But the field exists in both entity and db:-
<?php
namespace App\Entity;
use ApiPlatform\Core\Annotation\ApiResource;
use App\Repository\ProjectExportRepository;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Serializer\Annotation\Groups;
/**
* #ORM\Entity(repositoryClass=ProjectExportRepository::class)
*/
#[ApiResource]
class ProjectExport
{
...
/**
* #ORM\Column(type="integer")
*/
#[Groups('entry-index')]
private $projectid;
...
mysql> describe project_export
-> ;
+-------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+----------------+
| id | int | NO | PRI | NULL | auto_increment |
| email | varchar(255) | NO | | NULL | |
| projectid | int | NO | | NULL | |
| status | tinyint(1) | NO | | NULL | |
| emailedat | datetime | NO | | NULL | |
| generatedat | datetime | NO | | NULL | |
+-------------+--------------+------+-----+---------+----------------+
6 rows in set (0.01 sec)
I'm serving the api from a docker instance locally. Not sure if this affects it any way?
So, why then, no data gets persisted and the error thrown?