problem to setpicture for rooms in media

whene i am editing "room type" after saving with picture selected fo room types from media ia involved with tjis error:

1452 Cannot add or update a child row: a foreign key constraint fails (`booking_test`.`uvu75_sr_room_types`, CONSTRAINT `fk_sr_room_types_sr_reservation_assets1` FOREIGN KEY (`reservation_asset_id`) REFERENCES `uvu75_sr_reservation_assets` (`id`) ON DELETE NO ACT) SQL=UPDATE `uvu75_sr_room_types` SET `reservation_asset_id`='',`name`='Tagh(double bed)',`alias`='tagh-double-bed',`description`='',`state`='1',`checked_out`='587',`checked_out_time`='2014-06-13 14:24:15',`created_by`='0',`created_date`='2014-05-29 04:37:40',`modified_by`='587',`modified_date`='2014-06-13 14:24:40',`language`='*',`params`='{\"show_smoking_option\":\"1\",\"show_child_option\":\"1\"}',`featured`='0',`ordering`='15',`occupancy_adult`='4',`occupancy_child`='6',`smoking`='0' WHERE `id`='20'

is there any body to help for this problem?
thanks in advance.

What is your Solidres version? Did you select an asset for your room type before saving?

Thank for your information and cooperation.
the asset was blank and after i changed it to a correct state save btn worked as well.