Symfony entity property access problem Could not determine access type

Question

Problem is here : Could not determine access type for property "rowElementData" in class "App\Entity\ReportSchemaRowElement". When i change $rowElementData for public this error isnt show up. I know its not correct solution. I dont understand why symfony cannot access to this property, i have methods like for a $rowElementDimensions or $rowElementProperty and this relations are same..

This is my entity code: App\Entity\ReportSchemaRowElement

    <?php

namespace App\Entity;

use ...

/**
 * @ORM\Entity(repositoryClass=ReportSchemaRowElementRepository::class)
 * @ORM\HasLifecycleCallbacks()
 */
class ReportSchemaRowElement
{
    use UuidGenerator;
    
    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     * @Groups("listing")
     */
    private $id;

    /**
     * @ORM\ManyToOne(targetEntity=ReportSchemaRow::class, inversedBy="reportSchemaRowElements")
     */
    private $row;

    /**
     * @ORM\Column(type="string", length=255)
     * @Groups("listing")
     */
    private $name;

    /**
     * @ORM\Column(type="string", length=255)
     * @Groups("listing")
     */
    private $type;

    /**
     * @ORM\Column(type="integer")
     * @Assert\LessThan(5)
     * @Assert\GreaterThan(0)
     * @Groups("listing")
     */
    private $size;

    /**
     * @ORM\Column(type="integer")
     * @Groups("listing")
     */
    private $priority;

    /**
     * @ORM\Column(type="text")
     */
    private $uuid;

    /**
     * @ORM\OneToMany(targetEntity=RowElementProperty::class, mappedBy="element", cascade={"persist", "remove"})
     * @Groups("listing")
     */
    private $rowElementProperty;

    /**
     * @ORM\OneToMany(targetEntity=RowElementDimension::class, mappedBy="element", cascade={"persist", "remove"})
     * @Groups("listing")
     */
    private $rowElementDimensions;

    /**
     * @ORM\OneToMany(targetEntity=RowElementData::class, mappedBy="element", cascade={"persist", "remove"})
     * @Groups("listing")
     */
    private $rowElementData;

    public function __construct()
    {
        $this->rowElementProperty = new ArrayCollection();
        $this->rowElementDimensions = new ArrayCollection();
        $this->rowElementData = new ArrayCollection();
    }
    
    
    public function getId(): ?int
    {
        return $this->id;
    }

    public function getRow(): ?ReportSchemaRow
    {
        return $this->row;
    }

    public function setRow(?ReportSchemaRow $row): self
    {
        $this->row = $row;

        return $this;
    }

    public function getName(): ?string
    {
        return $this->name;
    }

    public function setName(string $name): self
    {
        $this->name = $name;

        return $this;
    }

    public function getType(): ?string
    {
        return $this->type;
    }

    public function setType(string $type): self
    {
        $this->type = $type;

        return $this;
    }

    public function getSize(): ?int
    {
        return $this->size;
    }

    public function setSize(int $size): self
    {
        $this->size = $size;

        return $this;
    }

    public function getPriority(): ?int
    {
        return $this->priority;
    }

    public function setPriority(int $priority): self
    {
        $this->priority = $priority;

        return $this;
    }

    public function getUuid(): ?string
    {
        return $this->uuid;
    }

    public function setUuid(string $uuid): self
    {
        $this->uuid = $uuid;

        return $this;
    }

    /**
     * Tworzy i ustawia UUID na podstawie hostname oraz unikalnego ID z php.
     * @ORM\PrePersist
     */
    public function generateUuid()
    {
        if ($this->getUuid() === null) {
            $this->makeUuid($this->getName());
        }
    }

    /**
     * @return Collection|RowElementProperty[]
     */
    public function getRowElementProperty(): Collection
    {
        return $this->rowElementProperty;
    }

    public function addRowElementProperty(RowElementProperty $rowElementProperty): self
    {
        if (!$this->rowElementProperty->contains($rowElementProperty)) {
            $this->rowElementProperty[] = $rowElementProperty;
            $rowElementProperty->setElement($this);
        }

        return $this;
    }

    public function removeRowElementProperty(RowElementProperty $rowElementProperty): self
    {
        if ($this->rowElementProperty->removeElement($rowElementProperty)) {
            // set the owning side to null (unless already changed)
            if ($rowElementProperty->getElement() === $this) {
                $rowElementProperty->setElement(null);
            }
        }

        return $this;
    }

    /**
     * @return Collection|RowElementDimension[]
     */
    public function getRowElementDimensions(): Collection
    {
        return $this->rowElementDimensions;
    }

    public function addRowElementDimension(RowElementDimension $rowElementDimension): self
    {
        if (!$this->rowElementDimensions->contains($rowElementDimension)) {
            $this->rowElementDimensions[] = $rowElementDimension;
            $rowElementDimension->setElement($this);
        }

        return $this;
    }

    public function removeRowElementDimension(RowElementDimension $rowElementDimension): self
    {
        if ($this->rowElementDimensions->removeElement($rowElementDimension)) {
            // set the owning side to null (unless already changed)
            if ($rowElementDimension->getElement() === $this) {
                $rowElementDimension->setElement(null);
            }
        }

        return $this;
    }

    /**
     * @return Collection|RowElementData[]
     */
    public function getRowElementData(): Collection
    {
        return $this->rowElementData;
    }

    public function addRowElementData(RowElementData $rowElementData): self
    {
        if (!$this->rowElementData->contains($rowElementData)) {
            $this->rowElementData[] = $rowElementData;
            $rowElementData->setElement($this);
        }

        return $this;
    }

    public function removeRowElementData(RowElementData $rowElementData): self
    {
        if ($this->rowElementData->removeElement($rowElementData)) {
            // set the owning side to null (unless already changed)
            if ($rowElementData->getElement() === $this) {
                $rowElementData->setElement(null);
            }
        }

        return $this;
    }
}