set different ids/entities/Sync entity relationships (for OneToMany)

How can I update/set different relationship entities (or IDs) for my OneToMany relationship? The entities are these:

@Entity()
export class Role extends BaseEntity {
    @PrimaryGeneratedColumn('uuid')
    id: string

    @Column()
    name: string

    @OneToMany(type => RolePermission, entity => entity.role, {cascade: true})
    permissions: RolePermission[]
}

@Entity('role_permission')
export class RolePermission extends BaseEntity {
    @PrimaryGeneratedColumn("uuid")
    id: string

    @Column()
    permission: string

    @ManyToOne(type => Role, entity => entity.permissions)
    role: Role
}

I am trying to update the role's permissions but with no luck. I have tried this:

        const role = await Role.findOneByOrFail({id})
        await role.save({
            data: {
                name: form.name,
                permissions: form.permissions.map(permission => RolePermission.create({permission}))
            },
        })

But it doesn't set the new related entities in the table. I can still see the old relationships

I have also tried this:

        const role = await Role.findOneByOrFail({id})
        await Role.update({id},{
            name: form.name,
            permissions: form.permissions.map(permission => RolePermission.create({permission}))
        })

But I get this error for this one: Cannot query across one-to-many for property permissions

I have also tried this:

        const role = await Role.findOneByOrFail({id})
        role.name = form.name
        role.permissions = form.permissions.map(permission => RolePermission.create({permission, role}))
        await role.save()

But I get QueryFailedError: ER_BAD_NULL_ERROR: Column 'role_id' cannot be null EVEN if I specify the role when creating a RolePermission

Also, tried this:

await DB.createQueryBuilder().relation(Role, "permissions").of(roleId).add(permissionsIds)

But this one doesn't do anything. The table still has the old relationships

Any other solutions to this?