what does DATA TUPLE mean? what to do?

[yvonne kire]

What is this?
And what do I do?
only found by doing a SHOW INNODB STATUS \G
noting in mysql.err log
anything to worry about?
How do I avoid / fix this error?
thx

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LATEST FOREIGN KEY ERROR
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081124 9:47:41 Transaction:
TRANSACTION 0 169478121, ACTIVE 0 sec, process no 4036, OS thread id 1955060656 updating or deleting, thread declared inside InnoDB 499
mysql tables in use 3, locked 3
5 lock struct(s), heap size 320, undo log entries 1
MySQL thread id 20979681, query id 317154772 portal preparing
update tablex set last_date = @'0', tablex_id = ( select tably_id from tabley_def where short_name = @'1') where use_id = @'2' and talbley_id not in (select tabley_id from tablex where short_name in ('posed','ated'))
Foreign key constraint fails for table `tablex`:
,
CONSTRAINT `tablex_fk_2` FOREIGN KEY (`tabley_id`) REFERENCES `tablex` (`tablex_id`)
Trying to add in child table, in index `tablex_id` tuple:
DATA TUPLE: 2 fields;
0: len 4; hex 00000000; asc ;; 1: len 4; hex 00006a10; asc j ;;

But in parent table `tablex`, in index `PRIMARY`,
the closest match we can find is record:
PHYSICAL RECORD: n_fields 7; compact format; info bits 0
0: len 4; hex 00000001; asc ;; 1: len 6; hex 000009a25740; asc W@;; 2: len 7; hex 80000000340110; asc 4 ;; 3: len 4; hex 45bffa7a; asc E z;; 4: len 4; hex 45bffa7a; asc E z;; 5: len 18; hex 41637469766174696f6e2050656e64696e67; asc Activation Pending;; 6: len 7; hex 756e626f756e64; asc unbound;;

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