That's a good question. It's not a valid tag. It might have something to do with internal data at Latvijas pasts, but at least one such ID was not found in a quick online search.
Address information is correlated to the official data via ref:LV:addr key/tag.

Rozkalns, is there anything important to preserve from that tag (changing it somehow)?
If not, will clean it up a bit later.

Thank you for the map improvements.
Please note that most address changes will be reverted by an automatic process.
In Latvia, addresses are updated from the official VZD data - thus, for example, way/1395325394/history will get the address returned soon.

If there is a wish to change the addresses, this should be handled through the local council. Once those changes trickle into the VZD data, they will also appear in OSM data.

We also invite any OSM related discussions on the Latvian OSM community chat, https://osmlatvija.zulipchat.com .

Papildinot - tas ļauj darboties maršrutēšanas, datu kvalitātes un citiem rīkiem.

Vai Nēģu laukums nesanāk visa teritorija Gaļas paviljona priekšā?

Paldies par kartes papildināšanu.
Vai node/13050892764/history ir nosaukums arī latviski? Ja tā, to var likt "name", un anglisko - "name:en" tagā.

Thank you for map updates.
In OSM, it is usually recommended to change properties that need adjustment instead of deleting/readding objects.
Was there a particular reason to delete and re-add the building here?

NSI?
There seem to be at least 4 of these in Latvia.

Sveiki, liels paldies par brāļu kapu kartēšanu - pirms kāda laika šo to sazīmēju, bet vēl tik daudz palicis.

Noteikti arī priecāsimies apspriesties Latvijas OSM kopienas čatā - https://osmlatvija.zulipchat.com/ .

For the record, you are welcome in the Latvian OSM community chat, where this and any other OSM-related question are very on-topic:
https://osmlatvija.zulipchat.com .

Tas laikam visvairāk noder kartētājiem, tādējādi samazinot risku, ka no veciem attēliem vēlreiz iezīmē kaut ko jau slēgtu.

Presumably the comment "removed driveway into private yard" was a bit suspicious - existing driveways definitely should not be removed, at most they should have "access" tag added.

Burvīgi, liels paldies par precizējumu un kartes uzlabojumiem.

Paldies par atbildi un izmaiņu veikšanu.
Vai tas ir kaut kā labiekārtots gājēju ceļš (piem., grants vai cits segums), vai arī taka mežā?
Latvijā tiek izmantots neliels nošķīrums, takas apzīmējot ar highway=path, savukārt gājēju ceļus - ar footway.

Sveiki, kas te noticis - vai ceļš bija pilnībā zudis, vai tomēr palicis un, piemēram, pieejams kājām ejot?

Sveiki, liels paldies par kartes papildināšanu.
Šobrīd šis posms ir palicis kā autoceļš, bet tam ar auto vairs nekā nevar piekļūt. Vai tas ir ar auto braucams? Ja jā, kur tam ir piekļuve?
way/290846945

Hey, just to confirm - does this shop=farm exist?
I don't recall seeing it when passing by, but I might just be not too attentive towards such things :)

node/2910671198

And to add to the great explanation HellMap posted, you are very welcome to discuss these topics in the Latvian OSM community chat at https://osmlatvija.zulipchat.com .

Paldies, tā EveryDoor dara - tagad salabots.

No worries at all, this is one of those things where there's no single correct approach, and it's hard to cause huge problems anyway :)

Got it, thank you for the clarification.
It might be due to node merging, not sure whether that is feasible in iD.
In any case, further discussions welcome in Zulip :)