Understanding DBMS_SQLTUNE.REPORT_TUNING

hello gurus Oracle,

    I would like understand the "REPORT_TUNING_TASK" from the advisor oracle.

i read this next advisor :

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1- Restructure SQL finding (see plan 1 in explain plans section)
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An expensive cartesian product operation was found at line ID 68 of the

Therefore i would like understand what are the tables which have not any link between them.

I join you my report.

thank you for your help

JP

  execution plan

>>>>>

I go to the ID 68 and i read :

>>>>>>

|  68 |	MERGE JOIN CARTESIAN	|	|	14 |  5782 |	13   (0)| 00:00:01 |
|  69 |	NESTED LOOPS	|	|	|	|	|	|
|  70 |	NESTED LOOPS	|	|	1 |	94 |	4   (0)| 00:00:01 |
|  71 |	TABLE ACCESS BY INDEX ROWID| PA_PROJECTS_ALL	|	1 |	66 |	3   (0)| 00:00:01 |
|* 72 |	INDEX RANGE SCAN	| PA_PROJECTS_U1