Yum source replacement

1. Environment: redhat 6.5
2. Problem: mirrors.163.com URL version 6.5 yum source is gone, only version 6 (available). But if you want to change it to the yum source of 6.5 in vault.centos.org.com, the one modified by rhel-source.repo is like 3 (the red box is changed according to the previous 163.com, and so is the one below)
3.
clipboard.png
4. But an error occurred in, yum makecache after the change
5. Thank you very much for helping me point out what went wrong

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Mar.22,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e44a82-4c1d9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e44a82-4c1d9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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