Performance Issue while changing a characteristic using CT04 transaction

Hi Experts,
Just now we have upgraded our system from 4.6C to ECC 6.0. In the new system we have created some characteristics and later I am trying to change these characteristics using transaction CT04 .
There are some characteristics which are already present in the new system which has come from 4.6 C. Now when I try to open/change these characteristic (already existing) using CT04 it does not take any time where as if I try to open/change a characteristic which is created newly in ECC 6.0, then it takes a lot of time.
When I run SQL trace for both the scenario, then I find that most of the time taken is on Query on table PLFV.
Trace Result for Newly Created Characteristic :
115 PLFV PREPARE 0 SELECT WHERE "MANDT" = :A0 AND "ATINN"
= :A1 AND "LOEKZ" = :A2 AND ROWNUM <= :A3
3 PLFV OPEN 0 SELECT WHERE "MANDT" = '070' AND "ATINN" =
0000000575 AND "LOEKZ" = ' ' AND ROWNUM <= 1
336681733 PLFV FETCH 0 1403
For this time taken is 336681733 .
Trace Result for Existing Characteristic :
2 PLFV OPEN 0 SELECT WHERE "MANDT" = '070' AND "
ATINN" = 0000000575 AND "LOEKZ" = ' ' AND ROWNUM <= 1
For this time taken is 2.
Here one difference I see is that for the Newly created characteristic, Prepare, Open and Fetch part is executed where as for the already existing query only Open is executed.
The program which is used for querying PLFV is SAPLCMX_TOOLS_CHARACTERISTICS.
Could you please help me in this.
Your response is highly appreciated.
Regards,
Lalit Kabra

Hi Rob,
Thanks for the response. But the problem which I mentioned is not with all the characteristics. It occurs only with those characteristics which are newly created. The characteristics which are already created are opened without any delay.
So I am bit confused whether for this problem there would be be any note though I tried searching the same as well.
Please respond if some one has clue about this issue.
Your response is highly appreciated.
Regards,
Lalit Kabra

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