Postgres Query finds wrong entry

override suspend fun findByPlan(plan_id: String): Product? {
        return try {
            val columns = Columns.list("*", "prices(*)", "plans(*)")
            val results = supabaseClient.from("products")
                .select(columns = columns) {
                    filter {
                        eq("plans.id", plan_id)
                    }
                }
                .decodeList<Product>()

            results.firstOrNull()
        } catch (e: Exception) {
            println("Error fetching product by plan_id ($plan_id): ${e.message}")
            e.printStackTrace()
            null
        }
    }