Error in AR_INVOICE_API_PUB.populate distributionsORA-01427: single-row subquery returns more than o

Hi,

When i use ar_invoice_api_pub.create_single_invoice to create ar invoice/debit memo/credit memo, it error out with error "Error in AR_INVOICE_API_PUB.populate distributionsORA-01427: single-row subquery returns more than one row", below is my code, would you pls help me check what is the error?

DECLARE

  p_msg_count            NUMBER;

  p_msg_data             VARCHAR2(2000);

  p_trx_header_tbl       ar_invoice_api_pub.trx_header_tbl_type;

  p_trx_lines_tbl        ar_invoice_api_pub.trx_line_tbl_type;

  p_trx_dist_tbl         ar_invoice_api_pub.trx_dist_tbl_type;

  p_trx_salescredits_tbl ar_invoice_api_pub.trx_salescredits_tbl_type;