Data Consistency Tools 

Under normal operation, the DataHandler hooks described on Parent-Child Relations and IRRE keep colPos and the tx_gridelements_children counter (see Data Model) consistent automatically as editors work. The two tools on this page exist for exceptional cases where those values nevertheless become inconsistent, for example because an external process writes to tt_content outside a normal Grid Elements-aware save or because an edge case bypasses the expected maintenance behavior. They are corruption-repair tools for exceptional states, not a routine or scheduled maintenance step.

Grid Elements Col Pos Fixer 

Fixes grid children whose colPos is no longer -1. Per its own docblock, this is aimed at the specific case of a TYPO3 Core major-version upgrade: if Grid Elements' own signed SQL schema definition for colPos is not part of the active set a schema migration compares against during that upgrade, TYPO3 Core's unsigned definition can be applied to the column instead, which can affect the negative sentinel values stored there, see Data Compatibility Across TYPO3 Versions for the schema mechanism itself. This tool restores the -1 sentinel for any row whose tx_gridelements_container relation is still intact.

The fixer does not try to detect which rows are broken. It unconditionally reasserts the sentinel for every row that currently has a container:

UPDATE tt_content SET colPos = -1 WHERE tx_gridelements_container > 0
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Grid Elements Number Of Children Fixer 

Fixes the maintained tx_gridelements_children counter described on Data Model. Per its own docblock, this addresses drift caused by buggy cut/copy/paste or drag-and-drop behavior in edge cases. For every gridelements_pi1 container, it counts the container's actual children directly (tx_gridelements_container = <container uid>) and writes that count back, replacing whatever value the counter currently holds.

Running the tools 

Both are available as TYPO3 CLI commands and as classic TYPO3 Scheduler task types, so either a CLI or a backend-scheduled workflow can trigger the repair.

Tool Console command Scheduler task class
Col Pos Fixer vendor/bin/typo3 gridelements-col-pos-fixer GridElementsTeam\Gridelements\Task\GridelementsColPosFixer
Number Of Children Fixer vendor/bin/typo3 gridelements-number-of-children-fixer GridElementsTeam\Gridelements\Task\GridelementsNumberOfChildrenFixer

Neither tool needs to run on a schedule for Grid Elements to function correctly. Reach for them after a known external interference with tt_content, such as the upgrade scenario described above, or when the tx_gridelements_children count or a grid child's colPos sentinel is known to be inconsistent and normal backend editing does not correct it.