冲销凭证删除报错

1、问题描述

凭证冲销生成暂存凭证，删除冲销时报错，报错堆栈：

Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1

at java.lang.String.substring(String.java:1967)

at com.kingdee.eas.fi.gl.app.voucher.DeleteReverseVoucherService.removeRelation(DeleteReverseVoucherService.java:89)

at com.kingdee.eas.fi.gl.app.voucher.DeleteReverseVoucherService.clearReverseRelation(DeleteReverseVoucherService.java:44)

at com.kingdee.eas.fi.gl.app.voucher.DeleteReverseVoucherService.deleteVoucher(DeleteReverseVoucherService.java:29)

at com.kingdee.eas.fi.gl.app.BaseVoucherC