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Add known issue: DELT export unfiltered after STaaS cost estimation - #6956

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jaime-lealv:ki-delt-export-staas-estimation
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jaime-lealv wants to merge 7 commits into
SkylineCommunications:mainfrom
jaime-lealv:ki-delt-export-staas-estimation

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Adds a Known Issue page for the DELT export returning unfiltered data (element data, alarms, trend data of other elements/Agents) after a STaaS cost estimation (Test Run) has been run on a Cassandra Cluster system. The state persists until the Agent is restarted; stopping the test run does not clear it.

Affected: DataMiner 10.4.0 [CU17] and later (all 10.5.x / 10.6.x). Confirmed on 10.5 CU13 (customer) and reproduced on 10.6.

Internal reference: DCP309256 (Support Data Core), handed over to squad.create.data-core-turbo for a fix.

@jaime-lealv
jaime-lealv requested a review from a team as a code owner October 7, 2026 17:08
Added note about DELT exports returning unfiltered data after cost estimation.
Clarified note regarding the 24-hour period for data extrapolation and added information about DELT exports after cost estimation.

## Affected versions

DataMiner 10.4.0 [CU17] and later, including all 10.5.x and 10.6.x versions, on systems using a Cassandra Cluster database where the [STaaS cost estimation](xref:STaaS_cost_estimation) has been executed. Single-node Cassandra setups are likely also affected, but this has not been confirmed.

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What is the feature release version where this first occurs? Or does it only happen on the main release track?

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It happens on both tracks. The STaaS cost estimation on a Cassandra setup is supported from DataMiner 10.4.0 [CU17], 10.5.0 [CU5], and feature release 10.5.8 onwards (see the STaaS cost estimation page), and the affected export code is identical in all those versions. So the first feature release where it occurs is 10.5.8. I'll update the affected versions to "DataMiner 10.4.0 [CU17], 10.5.0 [CU5], and 10.5.8 onwards".

Updated affected versions for DELT export issue to include specific versions and clarify the impact on single-node Cassandra setups.
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