Multiple plans for my SQL- Which one is following?-11gr2

11gr2, windows-64-bit
I have one sql_id part of 3rd part application, need to tune it. When I tried to get its execution plan im seeing multiple plan_plan values. That means, multiple plans for
same sql_id
How could we know that which plan my sql_id is following.?
SQL> set lines 300
SQL> set pages 50
SQL> select * from TABLE(dbms_xplan.display_awr('5z1r29wc6514q'));
PLAN_TABLE_OUTPUT
SQL_ID 5z1r29wc6514q
SELECT INVOICE_ID,min(CHARGE_DATE),MAX(CHARGE_DATE),
sum(TOTAL_EXCL_VAT),sum(case when instr(LEVEL2,:"SYS_B_0")>:"SYS_B_1"
then SUM_QUANTITY else :"SYS_B_2" end) as KB from
RATOR_CDR.INVOICE_DETAIL_LINE I INNER JOIN SUBSCRIPTION S ON S.ID =
I.SUBSCRIPTION_ID inner join SERVICE S1 on S1.SUBSCRIPTION_ID=S.ID
WHERE INVOICE_ID in (SELECT id from RATOR.INVOICE WHERE
invoice_number is null) and S1.PHONE_NUMBER=:1   and LEVEL1=:2 group
by INVOICE_ID
Plan hash value: 216300602
| Id | Operation                            | Name                  | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT                     |                       |       |       | 1350 (100)|       |          |       |
|   1 | HASH GROUP BY                       |                       |   333 | 40293 | 1350   (1)| 00:00:17 |       |       |
|   2 |   HASH JOIN                          |                       |   333 | 40293 | 1348   (1)| 00:00:17 |       |       |
|   3 |    NESTED LOOPS                      |                       |       |       |            |       |          |       |
|   4 |     NESTED LOOPS                     |                       | 1638 |   161K|   866   (0)| 00:00:11 |       |       |
|   5 |      NESTED LOOPS                    |                       |     1 |    34 |     2   (0)| 00:00:01 |       |       |
|   6 |       TABLE ACCESS BY INDEX ROWID    | SERVICE               |     1 |    23 |     2   (0)| 00:00:01 |       |       |
|   7 |        INDEX RANGE SCAN              | SERVICE__PHONE_NUMBER |     1 |       |     1   (0)| 00:00:01 |       |       |
|   8 |       INDEX UNIQUE SCAN              | SUBSCRIPTION__ID_PK   |     1 |    11 |     0   (0)|       |          |       |
|   9 |      PARTITION RANGE ALL             |                       | 1684 |       |    46   (0)| 00:00:01 |     1 |    17 |
| 10 |       INDEX RANGE SCAN               | IDL_SUB_ID            | 1684 |       |    46   (0)| 00:00:01 |     1 |    17 |
| 11 |     TABLE ACCESS BY LOCAL INDEX ROWID| INVOICE_DETAIL_LINE   | 1581 |   103K|   864   (0)| 00:00:11 |     1 |     1 |
| 12 |    TABLE ACCESS FULL                 | INVOICE               | 6048 |   118K|   481   (1)| 00:00:06 |       |       |
SQL_ID 5z1r29wc6514q
SELECT INVOICE_ID,min(CHARGE_DATE),MAX(CHARGE_DATE),
sum(TOTAL_EXCL_VAT),sum(case when instr(LEVEL2,:"SYS_B_0")>:"SYS_B_1"
then SUM_QUANTITY else :"SYS_B_2" end) as KB from
RATOR_CDR.INVOICE_DETAIL_LINE I INNER JOIN SUBSCRIPTION S ON S.ID =
I.SUBSCRIPTION_ID inner join SERVICE S1 on S1.SUBSCRIPTION_ID=S.ID
WHERE INVOICE_ID in (SELECT id from RATOR.INVOICE WHERE
invoice_number is null) and S1.PHONE_NUMBER=:1   and LEVEL1=:2 group
by INVOICE_ID
Plan hash value: 1282779260
| Id | Operation                            | Name                  | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
PLAN_TABLE_OUTPUT
|   0 | SELECT STATEMENT                     |                       |       |       | 1392 (100)|       |          |       |
|   1 | HASH GROUP BY                       |                       |   325 | 39000 | 1392   (1)| 00:00:17 |       |       |
|   2 |   HASH JOIN                          |                       |   325 | 39000 | 1391   (1)| 00:00:17 |       |       |
|   3 |    TABLE ACCESS FULL                 | INVOICE               | 5972 |   116K|   550   (1)| 00:00:07 |       |       |
|   4 |    NESTED LOOPS                      |                       |       |       |            |       |          |       |
|   5 |     NESTED LOOPS                     |                       | 1794 |   175K|   840   (0)| 00:00:11 |       |       |
|   6 |      NESTED LOOPS                    |                       |     1 |    34 |     2   (0)| 00:00:01 |       |       |
|   7 |       TABLE ACCESS BY INDEX ROWID    | SERVICE               |     1 |    23 |     2   (0)| 00:00:01 |       |       |
|   8 |        INDEX RANGE SCAN              | SERVICE__PHONE_NUMBER |     1 |       |     1   (0)| 00:00:01 |       |       |
|   9 |       INDEX UNIQUE SCAN              | SUBSCRIPTION__ID_PK   |     1 |    11 |     0   (0)|       |          |       |
| 10 |      PARTITION RANGE ALL             |                       | 1836 |       |    48   (0)| 00:00:01 |     1 |    18 |
| 11 |       INDEX RANGE SCAN               | IDL_SUB_ID            | 1836 |       |    48   (0)| 00:00:01 |     1 |    18 |
| 12 |     TABLE ACCESS BY LOCAL INDEX ROWID| INVOICE_DETAIL_LINE   | 1722 |   110K|   838   (0)| 00:00:11 |     1 |     1 |
------------------------------------------------------------------------------------------------------------------------------also, Any suggestions to tune this query
Thanks

Harry wrote:
11gr2, windows-64-bit
I have one sql_id part of 3rd part application, need to tune it. how do plan on modifying 3 ^rd^ party application?

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Understood, second plan is for self 'dbms_xplan'.
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PLAN_TABLE_OUTPUT
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