# Upgrade issues unable to upgrade the mappings for the index, field name contains dot **URL:** \ **Category:** Elasticsearch\ **Created:** [March 8, 2019, 1:25pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501 "2019-03-08T13:25:16Z")\ **Posts on this page:** 7\ **Page:** 2
**Author:** ![Vishal\_0611](https://avatars.discourse-cdn.com/v4/letter/v/a88e4f/32.png) [@Vishal\_0611](https://discuss.elastic.co/u/Vishal_0611)\ **Post date:** [March 22, 2019, 2:57pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/21 "2019-03-22T14:57:17Z")
I was trying to ask you. Is filter added in the mapping to improve the performance? Because If you refer to my 1st comment wherein I mentioned error as "unable to upgrade the mappings for the index [test\_09], reason: [Field name [dv.fullId] cannot contain '.']","caused\_by":{"type":"mapper\_parsing\_exception","reason":"Field name [dv.fullId] cannot contain '.'"}}},"status":500} So to fix this we have removed the filter and then performed reindex to remote. So asking you the same, removing filter will have performance impact or functionality break of application? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 22, 2019, 3:09pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/22 "2019-03-22T15:09:46Z")
I don't see the relationship between this error message and a filter. ---
**Author:** ![Vishal\_0611](https://avatars.discourse-cdn.com/v4/letter/v/a88e4f/32.png) [@Vishal\_0611](https://discuss.elastic.co/u/Vishal_0611)\ **Post date:** [March 22, 2019, 3:15pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/23 "2019-03-22T15:15:13Z")
Can you tell me the impact of removing the filter? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 22, 2019, 3:35pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/24 "2019-03-22T15:35:59Z")
Removing a filter from what? ---
**Author:** ![Vishal\_0611](https://avatars.discourse-cdn.com/v4/letter/v/a88e4f/32.png) [@Vishal\_0611](https://discuss.elastic.co/u/Vishal_0611)\ **Post date:** [March 22, 2019, 3:38pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/25 "2019-03-22T15:38:24Z")
Removing a filter from index mapping? ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [March 22, 2019, 4:05pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/26 "2019-03-22T16:05:01Z")
There is no filter in an index mapping. Or I don't recall we had that. Could you share a link to the documentation? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 19, 2019, 4:05pm UTC](https://discuss.elastic.co/t/upgrade-issues-unable-to-upgrade-the-mappings-for-the-index-field-name-contains-dot/171501/27 "2019-04-19T16:05:02Z")
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