Postman: wp_mail has been declared by

I am getting this error in the error.log. Postman appears to still be working. This error is just filling the error log. Here is the diagnostic test data:

Mailer: postsmtp
HostName: XXXXXXXXX.com
cURL Version: 7.62.0
OpenSSL Version: OpenSSL/1.0.2k
OS: Linux nwpro3.fcomet.com 2.6.32-954.3.5.lve1.4.71.el6.x86_64 #1 SMP Fri Sep 6 06:22:16 EDT 2019 x86_64
PHP: Linux 7.3.13 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=No, zlib_encode=Yes
WordPress: 5.3.2 en_US UTF-8
WordPress Theme: Woodmart Child
WordPress Plugins: Admin Columns Pro – WooCommerce, Addify – Site Map Generator, Admin Columns Pro, Advanced Post Types Order, WP Sheet Editor – Taxonomy Terms Pro, Disable Cart Fragments, Envato Market, Facebook for WooCommerce, Flexible Shipping UPS, Green Forms, Imagify, WPBakery Page Builder, Mailster – Email Newsletter Plugin for WordPress, Woocommerce Carpet Product, Dependent Custom Options (gallery), Permalink Manager Pro, Post SMTP, WP Real Media Library, WP Real Physical Media, Redux Framework, Slider Revolution, Safe SVG, Rank Math SEO, SupportCandy, Two Factor Authentication (Premium) (Premium), WooCommerce Dynamic Pricing & Discounts, Braintree For WooCommerce, WooCommerce Admin, WooCommerce AJAX Products Filter, Woocommerce Customizable Gift Card, WooCommerce Services, WooCommerce Ultimate Gift Card, WooCommerce, Woodmart Core, Asset CleanUp Pro: Page Speed Booster, WP Rocket | Exclude Files from Defer JS, WP Rocket, WP Sheet Editor – Media Library, WP Sheet Editor (Premium)
WordPress wp_mail Owner: /home/heartla1/public_html/wp-content/plugins/post-smtp/Postman/PostmanWpMailBinder.php
WordPress wp_mail_from Filter(s): change_contact_from_address
WordPress phpmailer_init Action(s): PostsmtpMailer->phpmailer_smtp_init
Postman: 2.0.9
Postman Sender Domain (Envelope|Message): heartlandbraidedrugs.com | heartlandbraidedrugs.com
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SMTP (smtp:tls:login://smtp.office365.com:587)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 101 | 11