Enabling permalinks disables custom page template

It is because of 

'has_archive' => true

which instruct wordpress to look for an archive template for the CPT. If you have a page with the same slug (portfolio) it will never get to display it as everything gets priority over pages.

Related Posts:

  1. How to create a permalink structure with custom taxonomies and custom post types like base-name/parent-tax/child-tax/custom-post-type-name
  2. Remove taxonomy slug from a custom hierarchical taxonomy permalink
  3. Rewriting a custom-post-type permalink with taxonomy term?
  4. Custom Post Type Permalink / Rewrite not working immediately
  5. What are the differences between custom post type and custom page templates?
  6. Ordering Posts List By Taxonomy Terms?
  7. Templates for Custom Post Types and Custom Taxonomies
  8. How to modify URL structures in custom post types and taxonomies or terms
  9. Create permalink structure for one taxonomy archive per custom post type
  10. Custom permalinks
  11. array_pop() expects array, boolean given for $event_type_term ->slug
  12. Understanding Permalinks on Custom Post Types
  13. custom post type permalinks with category and tags
  14. Add links to post categories and taxonomies in wysiwyg link modal?
  15. Custom Permalinks for Custom Post Types and Taxonomies
  16. How to rewrite custom post type URL for multiple depths instead of one specific depth
  17. Maintaining WP_Query Relation Among CPT, Custom Taxonomy, Permalinks- CPT UI
  18. Custom post type category, taxonomy and URL rewrite problem
  19. Define permalinks for custom post type by taxonomy in WP 3.4
  20. Remove taxonomy slug when not assigning taxonomy with custom post types
  21. Custom Post Type: How to display all of same taxonomy?
  22. Remove “-2” from a Toolset Types URL with the same post name
  23. Display Posts of a Category in Alphabetical Order (Custom Post Type)
  24. Remove Taxonomy Slug when No Taxonomy is Assigned to Custom Post Type?
  25. Include taxonomy slug in url?
  26. Custom permalink – append taxonomy name and term name at the end of permalink
  27. Programmatically adding posts
  28. Multiple portfolios with one custom post type?
  29. custom post type and custom taxonomy url conflict
  30. How to create a permalink structure with custom taxonomies and custom post types like base-name/parent-tax/child-tax/custom-post-type-name
  31. multiple url slug for single custom post type
  32. Add hierarchical taxonomy to permalink for custom post type
  33. Custom post types, taxonomies, and permalinks
  34. How to specify URLS for custom posts & taxonomies
  35. Custom post types, taxonomies, and permalinks
  36. Permalinks not working for custom taxonomy on custom post type
  37. custom permalinks based on taxonomies for custom post type
  38. Custom taxonomy in URL showing 404
  39. Custom Post Type permalink shows wrong page: homepage/index.php
  40. Custom-Posttype & Custom Taxonomy WP_Query
  41. Custom post type url with category
  42. Adding custom post category slug in permalink causes 404 error for pages and posts
  43. How Can I Change the Custom Post Type Slug to the Taxonomy Slug in the URL?
  44. Use same slug base for Custom Post Type posts, and multiple taxonomy terms
  45. create a subcatagory for a custom post type and out put url as posttype/subcategory/item
  46. Show custom post archive when custom post not specified
  47. Show custom post type relationships by taxonomy
  48. Permalinks: custom post type -> custom taxonomy -> post
  49. CPT’s with landing page instead of archive – Url Rewrite?
  50. Custom post type permalink tag 404
  51. Permalink structure with custom taxonomies and custom post type like /parent-tax/child-tax/custom-post-type-name (with no base name)
  52. Custom post type and taxonomy permalinks
  53. Hierarchical permalinks for custom post type and taxonomy
  54. set permalink for CPT
  55. Custom permalink with child taxonomy terms
  56. Custom post type Permalinks with hierarchical Taxonomies
  57. How to solve this custom post type goes to 404 page?
  58. Can’t use pagination with custom taxonomy
  59. Permalink problems with custom post type and custom taxonomy
  60. Custom Post Type Advanced Slug
  61. How to get all posts related to particular category name on button click?
  62. WordPress custom permalink and archive link for custom post type
  63. Custom post type category permalinks and archive pages
  64. Loop and add Specific Categories and Products Images
  65. Safe to throw 404 error in request filter?
  66. Using get_terms() to list terms from one custom taxonomy AND from one specific built-in category
  67. Custom Permalink For Custom Post Type – Working Fine But Broken For Pagination
  68. Set priority to permalinks
  69. Is there a way to use ‘publicly_queryable’ => false only on specific taxonomy term?
  70. Changing CPT permalink
  71. Changing permalink of default Post with custom post
  72. Custom Taxonomy Archive generates 404
  73. Custom post type single with custom URL structure
  74. How to change URL structure for custom post type in wordpress? Custom taxonomy + custom Post name [duplicate]
  75. Remove CPT Slug with 2 taxonomies and 1 post meta
  76. Custom post type and taxonomy same slug
  77. How to create a permalink structure with custom taxonomies and custom post types
  78. How to structure a website with custom post types and custom taxonomies?
  79. Pagination not working (page/2 retunring 404 page)
  80. Template hierarchy changes when custom post-type permalink leverages custom taxonomy
  81. Associate custom CPT with another CPT’s taxonomy and rewrite permalinks
  82. Post Custom & Taxonomy 404 error
  83. Custom Post Type Taxonomy – Permalinks generating, but posts not found
  84. Multiple archives for cpt, taxonomies, terms
  85. Custom taxonomy in custom post type archive with pagination
  86. Same permalink structure for all post types?
  87. How to add base permalink to custom posts?
  88. Custom Post type and Taxonomy in post URL error
  89. Hierarchical taxonomy in permalink structure
  90. How to retrieve the permalink for a specific (custom) term?
  91. Permalink Trouble with Custom Post Type
  92. Category / Custom Post Type permalink issue
  93. Adding rewrite rules to Custom Post-type mixed with Taxonomy
  94. Dynamically change Custom Post Type Template OR Change Permalink?
  95. How to have a dynamic slug and rendering the archive-{post_type}.php?
  96. Add /blog to the “post” post type url
  97. 404 Error On Custom Taxonomy Pages 2, 3, etc
  98. Hide custom post type slug url from search engine [closed]
  99. Modify permalink of CPT archive to support two taxonomies
  100. Permalinks for Custom Post Types and Taxonomies