Spanish authorities moved a luxury yacht linked to the sanctioned head of Russian defence group Rostec after the shipyard where it was berthed stopped receiving payments for its repairs, a transport ministry source said.The multi-million-dollar Valerie was transferred to a marina last month, the source and other officials said, highlighting the logistical challenges authorities have faced managing vessels being held across Europe because of sanctions imposed over Russia's military actions in Ukraine.Spain ordered the ship "frozen" - meaning the vessel can not be used or sold - in March, saying it was acting on European Union sanctions.