re: Marinetraffic - looks like crap data. MMSI 512000390 shown with that data is a NZ allocation (Indonesian MMSIs begin 525------), and no evidence of change of call-sign.
Look at Maritime-Connector: http://maritime-connector.com/ship/anatoki-8864153/print/
Like the grosstonnage.com data on here, it has 375gt which belongs with the previous name BAHANA NUSANTARA, but that was a total loss in 1998. M-C also give owner as "Jembatan Madura PT, Surabaya" That company hasn't been in business since 1975, when it became PT Jembatan Nusantara. Goodness known which BLUE MOON they think she also was.