Samsung Galaxy Tab S5e LTE (gts4lv): cannot upgrade from /e/OS 3.0.4 A14 to 3.0.4 A15

It sounds like you are using the a14 Recovery when the a15 recovery is required.

If you are concerned you might compare those two dates and the Android SPL diff of a14 and a15. Release notes Releases 路 e / os / 馃殌 Releases 路 GitLab point to Android Security Bulletin鈥擩une 2025  |  Android Open Source Project but the page includes wording as

SPL-June

leading to this request for better info Please put the complete date of the security patch date in the release notes

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