INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (8691, 'EPSG', 8691, '+vunits=m +no_defs +type=crs', 'VERT_CS["SRB_VRS12 height",VERT_DATUM["Serbian Vertical Reference System 2012",2005,AUTHORITY["EPSG","1216"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","8691"]]');