See
SELECT st_makevalid('POLYGON ((598003.4849443114 5325978.288854313, 598019.7449348173 5325982.413495027, 598036.9966877099 5325985.176546716, 598042.8267686924 5325984.4979892755, 598046.4229000872 5325986.371658631, 598078.3655819619 5325991.34276151, 598083.8878627924 5325991.237100496, 598092.6227712187 5325992.776229829, 598096.3492982117 5325994.429808194, 598132.8710515047 5326000.424558396, 598137.6442693556 5325999.249950156, 598140.915042991 5325999.67281278, 598144.1441265537 5326002.096146798, 598163.6381410899 5326004.864608504, 598170.38531015 5326005.013471729, 598173.4626870117 5326000.196612171, 598184.5724560271 5325998.352295577, 598196.2420131462 5325997.318059992, 598205.3328128117 5325998.085218615, 598213.045235186 5325999.729315703, 598215.4667951063 5325986.6630382035, 598217.1775331628 5325972.906407454, 598219.3241563962 5325960.669248893, 598223.9881157577 5325968.92063883, 598228.4935074368 5325987.297530931, 598243.6522338333 5325996.117847299, 598268.7026505754 5326002.005880023, 598307.0470037074 5326017.70537465, 598323.2262882312 5326021.740560573, 598334.6636723676 5326022.514810426, 598335.0902894547 5326028.0476212725, 598407.4719685452 5326031.668556132, 598383.2103152417 5325844.341512322, 598399.2792301291 5325846.151465277, 598420.5409319543 5325732.493249696, 598424.7707265288 5325731.743135763, 598480.2760708437 5325737.821316522, 598508.1153171442 5325741.456893762, 598535.14038922 5325746.079210713, 598593.0807826507 5325761.316850651, 598649.7835026709 5325778.323745295, 598107.9648758237 5325707.836889621, 598109.7551539204 5325733.838410134, 598111.7318708443 5325763.311837929, 598100.7445987663 5325804.570569212, 598097.7537505792 5325822.618984062, 598084.9077483611 5325851.905560522, 598075.518004116 5325867.732179461, 598064.1509316695 5325885.481708668, 598052.6330608106 5325896.36907385, 598038.0839131859 5325907.204635104, 598026.5082231611 5325921.915542008, 598018.8355672884 5325935.370183012, 598011.6799352192 5325951.268441437, 598004.8439583599 5325968.517409957, 598004.2007638263 5325974.765667894, 598003.4849443114 5325978.288854313))'::geometry)