Entity system rotating object

Questions & Answers
1

I am new on entity system. I dont know why I am getting this error? Thanks for helps

My code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;
using Unity.Jobs;
using Unity.Transforms;
using Unity.Mathematics;
using Unity.Physics.Systems;
using Unity.Burst;

[BurstCompile]
[UpdateBefore(typeof(BuildPhysicsWorld))]
public class RotaterController : JobComponentSystem
{

    protected override JobHandle OnUpdate(JobHandle inputDeps)
    {
        float deltaTime = Time.DeltaTime;

        Entities.ForEach((ref Rotation rotation, in Rotater rotater) =>
        {
            rotation.Value =  math.mul(rotation.Value,quaternion.RotateZ(rotater.Speed));
        }).Run();

        return default;
    }

    
}

Error:

InvalidOperationException: The previously scheduled job ExportPhysicsWorld:ExportDynamicBodiesJob writes to the ComponentTypeHandle<Unity.Transforms.Rotation> ExportDynamicBodiesJob.JobData.RotationType. You must call JobHandle.Complete() on the job ExportPhysicsWorld:ExportDynamicBodiesJob, before you can read from the ComponentTypeHandle<Unity.Transforms.Rotation> safely.
Unity.Entities.InternalCompilerInterface.RunJobChunk[T] (T& jobData, Unity.Entities.EntityQuery query, Unity.Entities.InternalCompilerInterface+JobChunkRunWithoutJobSystemDelegate functionPointer) (at
2

using Unity.Entities;
using Unity.Jobs;
using Unity.Transforms;
using Unity.Mathematics;

[UpdateInGroup( typeof(FixedStepSimulationSystemGroup) )]
public class RotaterSystem : SystemBase
{
	protected override void OnUpdate ()
	{
		float deltaTime = Time.DeltaTime;
		float speed = 10f;

		Entities
			.ForEach( ( ref Rotation rotation ) =>
			{
				rotation.Value =  math.mul( rotation.Value , quaternion.RotateZ(speed*deltaTime) );
			} )
			.WithBurst()
			.ScheduleParallel();
	}
}