Out of order timestamps in bulk file import about opentsdb.net HOT 2 OPEN

New timestamp=1537857720387 is less than or equal to previous=1537859699781 when trying to add value=[91, -87, -108, 49] to IncomingDataPoints([0, 0, 87, 91, -87, -36, -16, 0, 0, 1, 0, 0, 1, 0, 0, 2, 0, 0, 18, 0, 0, 3, 0, 0, 18, 0, 0, 4, 0, 0, 15] (metric=AcqTime), base_time=1537858800 (Tue Sep 25 07:00:00 UTC 2018), []) at net.opentsdb.core.IncomingDataPoints.addPointInternal(IncomingDataPoints.java:289) ~[tsdb-2.3.1.jar:eca1ef41] at net.opentsdb.core.IncomingDataPoints.addPoint(IncomingDataPoints.java:395) ~[tsdb-2.3.1.jar:eca1ef41] at net.opentsdb.tools.TextImporter.importFile(TextImporter.java:194) [tsdb-2.3.1.jar:eca1ef41] at net.opentsdb.tools.TextImporter.main(TextImporter.java:76) [tsdb-2.3.1.jar:eca1ef41]

{"short_revision":"eca1ef41","repo":"/opentsdb/build","host":"67024e5790cf","version":"2.3.1","full_revision":"eca1ef413bfde7cde5450e093d544118e0877ef0","repo_status":"MINT","user":"root","branch":"master","timestamp":"1537367591"}