Trouble adding new entities in symfony / doctrine

Question

I am getting the error "A new entity was found through the relationship 'App\Entity\UserProfileMatch#profile'" with the code below in my Symfony / Doctrine app.

Details:

I have the following Profile entity:

<?php

#[ORM\Entity(repositoryClass: ProfileRepository::class)]
#[ORM\Table(name: '`profile`')]
class Profile
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column]
    private ?int $id = null;

    #[ORM\Column(type: 'integer', unique: true)]
    private ?int $userId = null;

    #[ORM\Column(type: 'integer', unique: true)]
    private ?int $profileTypeId = null;

    // Relationships
    #[ORM\ManyToOne(targetEntity: ProfileType::class)]
    #[ORM\JoinColumn(name: 'profile_type_id', referencedColumnName: 'id', nullable: false)]
    private ?ProfileType $profileType = null;

    #[ORM\OneToMany(targetEntity: UserProfileMatch::class, mappedBy: 'profile', cascade: ['persist'])]
    private Collection $userProfileMatch;

    // .. getters and setters
}

?>

And the following UserMatchProfile entity:

<?php

#[ORM\Entity(repositoryClass: UserProfileMatchRepository::class)]
#[ORM\Table(name: '`user_profile_match`')]
class UserProfileMatch
{
    #[ORM\Id]
    #[ORM\Column(type: 'integer')]
    private ?int $profileId = null;

    #[ORM\Id]
    #[ORM\Column(type: 'integer')]
    private ?int $profileTypeId = null;

    #[ORM\ManyToOne(targetEntity: Profile::class, cascade: ['persist'], inversedBy: 'UserProfileMatch')]
    #[ORM\JoinColumn(nullable: false)]
    private ?Profile $profile = null;

    #[ORM\ManyToOne(targetEntity: ProfileType::class, inversedBy: 'UserProfileMatch')]
    #[ORM\JoinColumn(nullable: false)]
    private ?ProfileType $profileType = null;

    // getts and setters
}
?>

They both have a relationship with ProfileTYpe Entity:

<?php

#[ORM\Entity(repositoryClass: ProfileTypeRepository::class)]
#[ORM\Table(name: '`profile_type`')]
class ProfileType
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column]
    private ?int $id = null;

    #[ORM\Column(type: 'string', length: 50, unique: true)]
    private ?string $option = null;

    public function getId(): ?int

    // getters and setters
}
?>

The above defines the following relationships:

Profile entity has one associated ProfileType entity Profile may have multiple UserProfileMatch entities associated with it UserProfileMatch may have one or more associated ProfileTypes

There's no issues so far, I can do the following without issues:

<?php

$profile = new Profile();
$profile->setUserId($user->getId());
$profileType = $this->profileTypeRepository->find($formData['profileTypeId']);
$this->entityManager->persist($profile);
$this->entityManager->flush();
?>

Data is saved as expected.

But then I expand the code by adding the following code immediately after it:

<?php
    $this->userProfileMatchRepository->deleteAllByProfileId($user->getId());
    $this->entityManager->clear();
    $this->entityManager->flush();

    foreach ($formData['match_profile_type_id'] as $profileTypeId) {
        $profileType = $this->profileTypeRepository->find($profileTypeId);
        $userProfileMatch = new UserProfileMatch();
        $userProfileMatch->setProfile($profile);
        $userProfileMatch->setProfileId($profile->getId());
        $userProfileMatch->setProfileType($profileType);
        $userProfileMatch->setProfileTypeId($profileTypeId);
        $this->entityManager->persist($userProfileMatch);
    }
    $this->entityManager->flush();
?>

And I get the following error:

new entity was found through the relationship 'App\Entity\Profile#profileType' that was not configured to cascade persist operations for entity: App\Entity\ProfileType@539. To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(..,cascade={"persist"}). If you cannot find out which entity causes the problem implement 'App\Entity\ProfileType#__toString()' to get a clue.

I only get the above error when trying to save the UserProfileMatch entity. I don't think setting cascade for the profile_type associated is ideal as the profile_type table should never be updated.

What am I doing wrong here, please help.