# ERC20PausableUpgradeable unchained **URL:** \ **Category:** Upgrades\ **Tags:** erc20, upgrades\ **Created:** [May 19, 2023, 6:33pm UTC](https://forum.openzeppelin.com/t/erc20pausableupgradeable-unchained/36307 "2023-05-19T18:33:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![RenanSouza2](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/renansouza2/32/18114_2.png) [@RenanSouza2](https://forum.openzeppelin.com/u/RenanSouza2)\ **Post date:** [May 19, 2023, 6:33pm UTC](https://forum.openzeppelin.com/t/erc20pausableupgradeable-unchained/36307/1 "2023-05-19T18:33:41Z")
Hey everyone, I have some questions behind the upgradeable contracts As far as I understood the \_init function should call all the \_init\_unchained functions from the contracts it inherits. But in the ERC20PausableUpgradeable the \_init skips the \_ERC20\_init\_unchainded and calls only \_Pausable\_init\_unchained What is the rationale behind not calling the init function of ERC20? ---
**Author:** ![ericglau](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/ericglau/32/15149_2.png) [@ericglau](https://forum.openzeppelin.com/u/ericglau)\ **Post date:** [May 19, 2023, 10:48pm UTC](https://forum.openzeppelin.com/t/erc20pausableupgradeable-unchained/36307/2 "2023-05-19T22:48:25Z")
See [https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/issues/172#issuecomment-1231554310](https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/issues/172#issuecomment-1231554310) for the rationale. ---
**Author:** ![RenanSouza2](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.openzeppelin.com/renansouza2/32/18114_2.png) [@RenanSouza2](https://forum.openzeppelin.com/u/RenanSouza2)\ **Post date:** [May 19, 2023, 11:07pm UTC](https://forum.openzeppelin.com/t/erc20pausableupgradeable-unchained/36307/3 "2023-05-19T23:07:29Z")
Thanks, that explained well