# Conflicting mutations
**URL:** https://discourse.cataclysmdda.org/t/conflicting-mutations/13742
**Category:** The Garage
**Created:** [May 14, 2017, 8:00am UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742 "2017-05-14T08:00:12Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@Ember](https://discourse.cataclysmdda.org/u/Ember)
#### Post date: [May 14, 2017, 8:00am UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/1 "2017-05-14T08:00:12Z")
you apparently can have slow feet and roadrunner at the same time
its a bit odd as one increases speed while the other reduces
build 6431
ver 0.C-22249
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### Author:  [@ZoneWizard](https://discourse.cataclysmdda.org/u/ZoneWizard)
#### Post date: [May 22, 2017, 3:42pm UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/2 "2017-05-22T15:42:47Z")
While perhaps a bug, considering the how the game will interpret this will be something of a “one cancels the other”. So if the bug doesn’t break anything it probably just cancels each other out or gives a tiny buff or debuff, depending on the exact hidden math of either.
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### Author:  [@Valiant](https://discourse.cataclysmdda.org/u/Valiant)
#### Post date: [May 23, 2017, 6:57pm UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/3 "2017-05-23T18:57:20Z")
Created a PR to address this - [https://github.com/CleverRaven/Cataclysm-DDA/pull/21101](https://github.com/CleverRaven/Cataclysm-DDA/pull/21101).
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### Author:  [@Chezzo](https://discourse.cataclysmdda.org/u/Chezzo)
#### Post date: [May 24, 2017, 5:34am UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/4 "2017-05-24T05:34:19Z")
You can also have ugly and pretty, and a whole lot of other conflicting mutations.
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### Author:  [@Solusphere](https://discourse.cataclysmdda.org/u/Solusphere)
#### Post date: [May 24, 2017, 6:18am UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/5 "2017-05-24T06:18:12Z")
> [@Chezzo](#):
>
> You can also have ugly and pretty, and a whole lot of other conflicting mutations.
If you have both of those at the same time, it’s absolutely a bug. Ugly is in Pretty’s cancelling mutations, and vice versa:
```
"type" : "mutation",
"id" : "PRETTY",
"name" : "Pretty",
"points" : 1,
"ugliness" : -2,
"description" : "You are a sight to behold. NPCs who care about such thing will react more kindly to you.",
"starting_trait" : true,
"category" : ["MUTCAT_ALPHA", "MUTCAT_FELINE", "MUTCAT_LUPINE"],
"cancels" : ["UGLY", "DEFORMED", "DEFORMED2", "DEFORMED3"],
"changes_to" : ["BEAUTIFUL"]
```
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### Author:  [@Coolthulhu](https://discourse.cataclysmdda.org/u/Coolthulhu)
#### Post date: [May 31, 2017, 9:28pm UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/6 "2017-05-31T21:28:21Z")
Mutation system has some edge cases that aren’t handled properly when inherent traits (the starting ones) are involved.
Here’s one example:
>
This one looks a bit different, though.
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### Author:  [@ZoneWizard](https://discourse.cataclysmdda.org/u/ZoneWizard)
#### Post date: [June 14, 2017, 7:02pm UTC](https://discourse.cataclysmdda.org/t/conflicting-mutations/13742/7 "2017-06-14T19:02:46Z")
So you are saying that the enabled start traits are not considered in regard to the cancel list? 0\_o
If so. Core bug I assume?