100XRP 求解释 ripple account_tx 接口

使用account_tx接口查询A帐号的tx记录，比如

conn.send_msg '{"command":"account_tx","account":"rPyHFsRMTnftdsmuntEVCpVSy3MkHGLeg6", "ledger_index_min":6213271, "ledger_index_max":6213271}'

返回的json显示，B账号给自己转了1000JPY，问题：为啥B账号的这条记录会包含在A账号的交易记录中？！谢谢！
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