8 – The site works well but the composer complains of the unmet requirements Do I have a problem?

I'm trying to get my permissions correctly, so that I do not have to run dialer as root. As part of this process, I deleted vendor, core and composer.lock and then launched the installation to deal with my non-root user. The site seems to be working well despite the message posted by the composer:

        Problem 1
- drupal / core 8.2.x-dev requires symfony / psr-http-message-bridge v0.2 -> satisfiable by symfony / psr-http-message-bridge[v0.2] but these conflict with your requirements or with minimal stability.
- do not install drupal / core-render 8.2.0 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.0-beta1 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.0-beta2 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.0-beta3 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.0-rc1 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.0-rc2 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.1 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.2 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.3 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.4 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.5 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.6 | remove drupal / drupal dev-master
- do not install drupal / core-render 8.2.7 | remove drupal / drupal dev-master

etc.

What does it mean? Is my site correct or did I take a wrong turn?

I'm not sure why the composer's message refers to "drupal / core 8.2.x-dev". Here is the "require" section of my composer.json:

"need": {
"composer / installers": "^ 1.0.24",
"wikimedia / composer-merge-plugin": "^ 1.4",
"drupal / entity_clone": "^1.0@beta",
"drupal / features": "^ 3.8",
"drupal / metatag": "^ 1.8",
"drupal / webform": "^ 5.1",
"drupal / config_installer": "^ 1.8",
"drupal / entity_browser": "^ 2.1",
"drupal / media_entity_browser": "^1.0@beta",
"drupal / entity_embed": "^1.0@beta",
"drupal / file_browser": "^ 1.1",
"drupal / admin_menu_search": "^ 1.0",
"drupal / admin_toolbar": "^ 1.26",
"drupal / backup_migrate": "^ 4.0",
"drupal / block_field": "^1.0@alpha",
"drupal / contact_block": "^ 1.4",
"drupal / contribution": "^5.0@beta",
"drupal / ctools": "^ 3.2",
"drupal / entity_reference_revisions": "^ 1.6",
"drupal / facets": "^ 1.3",
"drupal / field_group": "^ 1.0",
"drupal / form_placeholder": "^ 1.0",
"drupal / formblock": "^1.0@beta",
"drupal / glazed_helper": "^ 1.3",
"drupal / google_analytics": "^ 3.0",
"drupal / honeypot": "^ 1.29",
"drupal / imce": "^ 1.7",
"drupal / insert_block": "1.x-dev",
"drupal / linkit": "^ 4.3",
"drupal / login_emailusername": "^ 1.1",
"drupal / material_admin": "^1.0@alpha",
"drupal / menu_link_attributes": "^ 1.0",
"drupal / minifyhtml": "^ 1.6",
"drupal / paragraphs": "^ 1.6",
"drupal / pathauto": "^ 1.3",
"drupal / redirect": "^ 1.3",
"drupal / require_login": "^ 2.0",
"drupal / search_api": "^ 1.11",
"drupal / simple_sitemap": "^ 3.0",
"drupal / simplenews": "^1.0@alpha",
"drupal / tfa": "^ 1.0.0@alpha",
"drupal / token": "^ 1.5",
"drupal / video_embed_field": "^ 2.0",
"drupal / view_unpublished": "^1.0@alpha",
"drupal / viewport": "^ 1.1",
"drupal / viewsreference": "^ 1.4",
"drupal / workflow_state_config": "^ 1.0.0@alpha",
"drupal / xmlsitemap": "^1.0@alpha",
"drupal / allowed_formats": "^ 1.1",
"drupal / asset_injector": "^ 2.4",
"drupal / taxonomy_access_fix": "^ 2.6",
"drupal / text_summary_options": "^ 1.0",
"drupal / migrate_source_csv": "^ 2.2",
"drupal / migrate_plus": "^ 4.1",
"drupal / migrate_tools": "^ 4.1",
"drupal / migrate_file": "^ 1.1",
"drupal / entityqueue": "^1.0@alpha",
"drupal / module_missing_message_fixer": "^1.0@beta",
"drupal / rules": "^ 3..0 @ alpha",
"ckeditor / autogrow": "^ 4.8",
"ckeditor / codemirror": "^ 1.17",
"ckeditor / fakeobjects": "^ 4.8",
"ckeditor / image": "^ 4.8",
"ckeditor / link": "^ 4.8",
"codemirror / codemirror": "^ 5.36",
"jquery / geocomplete": "^ 1.7",
"jquery / icheck": "^ 1.0",
"jquery / image-picker": "^ 0.3.0",
"jquery / inputmask": "^ 3.3",
"jquery / intl-tel-input": "^ 12.1",
"jquery / rateit": "^ 1.1",
"jquery / select2": "^ 4.0",
"jquery / timepicker": "^ 1.11",
"jquery / toggle": "^ 4.0",
"jquery / word-and-character-counter": "^ 2.5",
"progress-tracker / progress-tracker": "^ 1.4",
"signature_pad / signature_pad": "^ 2.3",
"drupal / image_widget_crop": "^ 2.2",
"drupal / crop": "^ 1.5",
"drupal / advagg": "^ 3.5",
"drupal / advagg_js_minify": "^ 3.5",
"drupal / advagg_css_minify": "^ 3.5",
"drupal / better_exposed_filters": "^ 3.0.0@alpha",
"drupal / block_visibility_groups_admin": "^ 1.3",
"drupal / chosen": "^ 2.6",
"drupal / selected_field": "^ 2.6",
"drupal / content_export_csv": "^ 3..0 @ beta",
"drupal / contentimport": "^ 4.1",
"drupal / event": "1.x-dev",
"drupal / entity_reference_views_select": "^ 1.3",
"drupal / imce_search_plugin": "^ 1.0",
"drupal / inline_entity_form": "^ 1.0.0RC",
"drupal / job": "^ 3..0 @ alpha",
"drupal / media_bulk_upload": "^1.0@alpha",
"drupal / memcache": "^ 2.0",
"drupal / purge_ui": "^ 3..0 @ beta",
"drupal / purge_processor_lateruntime": "^ 3..0 @ beta",
"drupal / purge_tokens": "^ 3.0.0beta",
"drupal / twig_tweak": "^ 2.1",
"drupal / views_bulk_operations": "^ 2.5",
"drupal / block_visibility_groups": "^ 1.3",
"drush / drush": "^ 9.5",
"drupal / we_megamenu": "^ 1.5",
"drupal / views_infinite_scroll": "^ 1.5",
"drupal / embed": "^ 1.0",
"drupal / dropzonejs": "^ 2.0.0@alpha",
"drupal / purge": "^ 3..0 @ beta",
"drupal / address": "^ 1.4",
"drupal / acquia_connector": "^ 1.16",
"drupal / purge_purger_http": "^ 1.0.0beta",
"drupal / smtp": "^1.0@beta",
"drupal / content_sync": "^ 2.1",
"drupal / console": "~ 1.0",
"drupal / devel": "^ 2.0",
"drupal / core": "8.6.13"
}