# Unknown Error during CSV Import **URL:** \ **Category:** Get Help\ **Created:** [August 23, 2020, 9:38pm UTC](https://forum.adalo.com/t/unknown-error-during-csv-import/3486 "2020-08-23T21:38:00Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![aqsmith08](https://avatars.discourse-cdn.com/v4/letter/a/e9c0ed/32.png) [@aqsmith08](https://forum.adalo.com/u/aqsmith08)\ **Post date:** [August 23, 2020, 9:38pm UTC](https://forum.adalo.com/t/unknown-error-during-csv-import/3486/1 "2020-08-23T21:38:00Z")
Hi, I’m trying to conduct a simple CSV upload into a Collection I have named `Games`. It has properties like `Game Date`, `Home Team`, `Away Team` etc. When I try to upload the CSV file with ~250 rows, I receive this error. My [Adalo app is here](https://app.adalo.com/apps/a55c0d2c-a72a-4bb7-81c4-5b3471a6bb8a/data). Please advise. Thank you! ![Screenshot from 2020-08-23 15-37-10](https://us1.discourse-cdn.com/flex020/uploads/adalo/original/2X/4/4bd0307499373330d8fcd67f49ef9868c9fb8df0.png) ---
**Author:** ![anon78309838](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@anon78309838](https://forum.adalo.com/u/anon78309838)\ **Post date:** [August 24, 2020, 9:29am UTC](https://forum.adalo.com/t/unknown-error-during-csv-import/3486/2 "2020-08-24T09:29:32Z")
Hey @aqsmith08. This could be for multiple reasons. Are some of the fields you uploading too a relational property to another collection? You would need to make sure that it is the primary field of that collection in order for this import to work. If this is not the case, please could you DM me a link to the CSV file so I can investigate further. ---
**Author:** ![system](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.adalo.com/system/32/40401_2.png) [@system](https://forum.adalo.com/u/system)\ **Post date:** [September 3, 2020, 9:29am UTC](https://forum.adalo.com/t/unknown-error-during-csv-import/3486/3 "2020-09-03T09:29:34Z")
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