| Conditions | 1 | 
| Paths | 1 | 
| Total Lines | 17 | 
| Code Lines | 12 | 
| Lines | 0 | 
| Ratio | 0 % | 
| Changes | 0 | ||
| 1 | <?php  | 
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| 7 | public function up()  | 
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| 8 |     { | 
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| 9 | $this->dropForeignKey(  | 
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| 10 | 'fk_screen_template_template_background1',  | 
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| 11 | 'screen_template'  | 
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| 12 | );  | 
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| 13 | |||
| 14 | $this->addForeignKey(  | 
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| 15 | 'fk_screen_template_template_background1',  | 
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| 16 | 'screen_template',  | 
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| 17 | 'background_id',  | 
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| 18 | 'template_background',  | 
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| 19 | 'id',  | 
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| 20 | 'SET NULL',  | 
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| 21 | 'SET NULL'  | 
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| 22 | );  | 
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| 23 | }  | 
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| 24 | |||
| 43 | 
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.